Kovalyshyn S., Dadak V., Sokolyk V., Grundas S., Stasiak M., Tys J.:  Geometrical and friction properties of perennial grasses and their weeds in view of an electro-separation method (2015 r.) International Agrophysics 2015, Vol. 29, 2, 185-191

Kovalyshyn S., Shvets O., Grundas S., Tys J.:  Use of the electro-separation method for improvement of the utility value of winter rapeseeds (2013 r.) International Agrophysics 2013, Vol. 27, 4, 419-424