@misc{active+power+measurement+based+on+digital+processing+of+voltage+and+current+signals, author = {Bień, Andrzej i Layer, Edward}, title = {Active power measurement based on digital processing of voltage and current signals}, journal = {Technical Transactions}, address = {Kraków}, publisher = {Wydawnictwo PK}, date = {2018}, number = {Vol. 115, iss. 6} }