@book { title = {Magyar Tudomány 2021/05}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202105_po-heading-id_PifpMnJ6q06dwjkk2dnezg_p1#matud202105_po-heading-id_PifpMnJ6q06dwjkk2dnezg_p1} }