@book { title = {Magyar Tudomány 2021/01}, year = {2021}, publisher = {Akadémiai Kiadó}, isbn = {}, doi = {}, URL = {https://mersz.hu/hivatkozas/matud202101_po-heading-id_-uCRpC2Yh0OtKn5piH2REw_p1#matud202101_po-heading-id_-uCRpC2Yh0OtKn5piH2REw_p1} }