About efficiency of power system state minimax optimizationLiik, OlevSymposium on electrical power engineering, 27 January 19891989 / p. 21-26

Double-Motor MHD-Drive for castingPettai, ElmoSymposium on electrical power engineering, 27 January 19891989 / p. 107-114

On optimal active and reactive load planning of thermal power plants considering probabilistic informationLeisalu, AarneSymposium on electrical power engineering, 27 January 19891989 / p. 13-20

Robot Servo-Drives Control SystemKulmar, Lembit; Lehtla, TõnuSymposium on electrical power engineering, 27 January 19891989 / p. 115-122

Technical monitoring system of MHD driveJansikene, RaikSymposium on electrical power engineering, 27 January 19891989 / p. 101-106