@book { title = {Magyar Tudomány 2021/07}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202107_po-heading-id_4CeVcs9kzkOdaGXhI6v4Tw_p1#matud202107_po-heading-id_4CeVcs9kzkOdaGXhI6v4Tw_p1} }