1. Traversal protection of two parallel lines without voltage path;Kletsel;Przeglad Elektrotechniczny,2016
2. Differential protection of three and four parallel lines of idling current control;Kletsel;Przeglad Elektrotechniczny,2017
3. Analysis of the sensitivity of back-up protections for distribution networks in power systems;Kletsel;Elektrichestvo,1992
4. Adaptive back-up overcurrent protection for tapped lines with single-end fud;Bogdan;Elektrichestvo,1991
5. Back-up line protection that responding to the difference in magnitudes of the phase currents and their increment;Kletsel’;Elektrichestvo,1993