@book { title = {Magyar Tudomány 2021/03}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202103_po-heading-id_JGeWyf20wkiKJNdju0FLOA_p2#matud202103_po-heading-id_JGeWyf20wkiKJNdju0FLOA_p2} }