Franetič, Damir, and Peter Marijan Kink. Problems in Mathematics 1 (with solutions): Study Material for the Course Mathematics 1 (63506A). Odprta učna gradiva. Ljubljana, SI: Založba Univerze v Ljubljani, 2024. Accessed April 11, 2025. https://ebooks.uni-lj.si/ZalozbaUL/catalog/book/583.