HERENCSÁR, Norbert, Abhirup LAHIRI, Kamil VRBA a Jaroslav KOTON. An electronically tunable current-mode quadrature oscillator using PCAs. INTERNATIONAL JOURNAL OF ELECTRONICS [online]. Taylor & Francis, 2012, 99(5), 609-621 [cit. 2023-09-23]. ISSN 0020-7217. Dostupné z: doi:10.1080/00207217.2011.643489