@book { title = {Magyar Tudomány 2021/05}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202105_po-heading-id_Bk5Uplb6tUCWneihwfceGw_p8#matud202105_po-heading-id_Bk5Uplb6tUCWneihwfceGw_p8} }