@ARTICLE{Malcher_A._Modified_2012, author={Malcher, A.}, volume={60}, number={No 4}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={739-750}, howpublished={online}, year={2012}, title={Modified current differencing transconductance amplifier – new versatile active element}, URL={http://www.journals.pan.pl/Content/83652/PDF/paper_08.pdf}, doi={10.2478/v10175-012-0085-7}, }