@book {
author = {Faragó István and Mezei István and Havasi Ágnes and Simon Péter},
title = {Introductory course in analysis},
year = {2014},
publisher = {Typotex Kiadó},
isbn = {978 963 279 223 1},
URL = {https://edu.interkonyv.hu/konyvek/farago-mezei-havasi-introductory-course-in-analysis/}
}