This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This biography of a living person relies on a single source. You can help by adding reliable sources to this article. Contentious material about living people that is unsourced or poorly sourced must be removed immediately. (December 2023) (Learn how and when to remove this message) This biography of a living person relies too much on references to primary sources. Please help by adding secondary or tertiary sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful.Find sources: "Krzysztof Szyga" – news · newspapers · books · scholar · JSTOR (December 2023) (Learn how and when to remove this message) This biography of a living person includes a list of general references, but it lacks sufficient corresponding inline citations. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful. Please help to improve this article by introducing more precise citations. (December 2023) (Learn how and when to remove this message) (Learn how and when to remove this message)