@book { title = {Magyar Tudomány 2021/12}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202112_po-heading-id_x-qmdrwaskeNZ8duI9L45g_p39#matud202112_po-heading-id_x-qmdrwaskeNZ8duI9L45g_p39} }