@book { author = {Gáspár Péter, Szabó Zoltán, Bokor József}, title = {Discrete Feedback Systems 1.}, year = {2019}, publisher = {Akadémiai Kiadó}, isbn = {978 963 454 372 5}, doi = {10.1556/9789634543725}, URL = {https://mersz.hu/kiadvany/503} }