• Boundary layer
• Bounded variation
• Elasticity theory
• Homogenization
• Partial differential equations
• Stefan problem
• Weak solutions

Biographical and general references

• Colautti Fichera, Matelda (December 2006), ... ed è subito sera... La lunga, brevissima vita di Gaetano Fichera (The long, extremely short life of Gaetano Fichera) (in Italian), Roma: Self-published, p. 217. The story of the life of Gaetano Fichera written by his wife, Matelda Colautti Fichera: this reference is important for understanding the friendship between Olga Oleinik, Gaetano Fichera and his wife.
• Friedlander, Susan; Keyfitz, Barbara (2006), "Olga Ladyzhenskaya and Olga Oleinik: Two Great Women Mathematicians of the 20th Century" (PDF), in Kuperberg, Krystyna (ed.), Women in Mathematics: The Legacy of Ladyzhenskaya and Oleinik – May 18–20, 2006, Berkeley, CA: AWM and MSRI, retrieved 1 July 2009. Some recollections of the authors about Olga Ladyzhenskaya and Olga Oleinik.
• Jäger, Willi; Lax, Peter; Synge Morawetz, Cathleen (2003), "Olga Arsen'evna Oleĭnik (1925–2001)" (PDF), Notices of the American Mathematical Society, 50 (2): 220–223, MR 1951108, Zbl 1159.01335. An ample commemorative paper written by three friends/collaborators.
• Magenes, E. (1996), "On the scientific work of Olga Oleinik" (PDF), Rendiconti di Matematica e delle Sue Applicazioni, Serie VII, 16 (3): 347–373, MR 1422388, Zbl 0861.35002, archived from the original on 28 May 2003 (Also available at the Internet Archive).
• Nirenberg, Louis (March 2004), "About Olga Arsen'evna Oleinik", Journal of Mathematical Sciences, 120 (3): 1241, doi:10.1023/B:JOTH.0000016045.00993.ef, MR 2085177, S2CID 119428680, Zbl 1290.35002. A short obituary notice by Louis Nirenberg.
• Synge Morawetz, Cathleen (2006), "Early Memories of Olga Ladyzhenskaya and Olga Oleinik" (PDF), in Kuperberg, Krystyna (ed.), Women in Mathematics: The Legacy of Ladyzhenskaya and Oleinik – May 18–20, 2006, Berkeley, CA: AWM and MSRI, retrieved 1 July 2009. Some recollections of the author about Olga Ladyzhenskaya and Olga Oleinik.
• Venttsel', T. D.; Vladimirov, V. S.; Zhikov, V. V.; Il'in, A. M.; Il'in, V. P.; Kondrat'ev, V. A.; Kudryavtsev, L. D.; Mishchenko, E. F.; Nikol'skii, S. M.; Osipov, Yu. S.; Radkevich, E. V.; Rozov, N. Kh.; Sadovnichii, V. A.; Faddeev, L. D.; Chechkin, G. A.; Shamaev, A. S.; Shaposhnikova, T. A.; Shkalikov, A. A. (2003), "Ol'ga Arsen'evna Oleinik (obituary)", Uspekhi Matematicheskikh Nauk, 58 (1(349)): 165–174, Bibcode:2003RuMaS..58..161V, doi:10.1070/RM2003v058n01ABEH000607, MR 1992133, Zbl 1050.01527. An almost comprehensive obituary article: its English translation is published in the Russian Mathematical Surveys as Ventsel, T D (2003), "Ol'ga Arsen'evna Oleinik", Russian Mathematical Surveys, 58 (1): 161–172, doi:10.1070/RM2003v058n01ABEH000607, MR 1992133, Zbl 1050.01527.
• Vernacchia-Galli, Jole (1986), "Olga Arsenievna Oleinik", Regesto delle lauree honoris causa dal 1944 al 1985, Studi e Fonti per la storia dell'Università di Roma (in Italian), vol. 10, Roma: Edizioni Dell'Ateneo, pp. 845–855. The "regest of honoris causa degrees from 1944 to 1985" (English translation of the title) is itself a detailed and carefully commented regest of all the documents of the official archive of the Sapienza University of Rome pertaining to the honoris causa degrees awarded or not. It includes all the awarding proposals submitted during the considered period, detailed presentations of the work of the candidate, if available, and precise references to related articles published on Italian newspapers and magazines, if the laurea was awarded.

Scientific references

• Radkevich, E. V. (2009), "Equations with nonnegative characteristic form. I", Journal of Mathematical Sciences, 158 (3): 297–452, doi:10.1007/s10958-009-9394-2, MR 2675370, S2CID 122736904, Zbl 1200.35158. This monograph consists of two volumes and is devoted to second-order partial differential equations (mainly, equations with nonnegative characteristic form). A number of problems of qualitative theory (for example, local smoothness and hypoellipticity) are presented, and the work of many contributors, like Olga Oleinik, Gaetano Fichera, the Author himself and others area thoroughly reviewed.
• Radkevich, E. V. (2009), "Equations with nonnegative characteristic form. II", Journal of Mathematical Sciences, 158 (4): 453–604, doi:10.1007/s10958-009-9395-1, MR 2675371, S2CID 189871177, Zbl 1200.35157. This monograph consists of two volumes and is devoted to second-order partial differential equations (mainly, equations with nonnegative characteristic form). A number of problems of qualitative theory (for example, local smoothness and hypoellipticity) are presented, and the work of many contributors, like Olga Oleinik, Gaetano Fichera, the Author himself and others area thoroughly reviewed.

• Kuperberg, Krystyna, ed. (2006), Women in Mathematics: The Legacy of Ladyzhenskaya and Oleinik – May 18–20, 2006, Berkeley, CA: AWM and MSRI, retrieved 1 July 2009. The proceedings of a workshop in honour of Olga Ladyzhenskaya and Olga Oleinik.
• O'Connor, John J.; Robertson, Edmund F., "Olga Oleinik", MacTutor History of Mathematics Archive, University of St Andrews.
• Olga Oleinik at the Mathematics Genealogy Project.
• Olga Oleinik at PlanetMath.
• Riddle, Larry, ed. (8 December 2010), Olga Arsen'enva Oleinik, retrieved 5 May 2011. A biography in the Biographies of Women Mathematicians, Agnes Scott College.