“SOLUTIONS OF FORWARD PROBLEMS OBTAINED VIA BOUNDARY ELEMENT METHOD FOR NONHOMOGENEOUS DOMAINS IN REGARD TO ELECTRICAL CONDUCTIVITY”. Informatyka, Automatyka, Pomiary W Gospodarce I Ochronie Środowiska, vol. 5, no. 3, Dec. 2019, pp. 14-18, https://doi.org/10.5604/20830157.1166546.