[1] HAMBLEY, Allan R. Electrical engineering: principles and applications. Seventh edition. New York: Pearson, [2019]. ISBN 978-1-292-22312-4 .
[2] MAKAROV, Sergey N.; LUDWIG, Reinhold a BITAR, Stephen J. Practical electrical engineering. Second edition. Cham: Springer, [2019]. ISBN 978-3-319-96691-5 .