@book {
author = {Fehér László and Kós Géza and Tóth Árpád},
title = {Mathematical Analysis -- Problems and Exercises II},
year = {2014},
publisher = {Typotex Kiadó},
isbn = {None},
URL = {https://edu.interkonyv.hu/konyvek/feher-kos-toth-mathematical-analysis-ii/}
}