@book { title = {Magyar Tudomány 2021/07}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202107_po-heading-id_M8v5JRyJ20G-iQSJjY1LTg_p2#matud202107_po-heading-id_M8v5JRyJ20G-iQSJjY1LTg_p2} }