Optimization of method of adjustment of productivity of multi-pump system containing directly connected motorsBakman, Ilja; Gevorkov, Levon; Vodovozov, ValeryPQ2014 : the 9th International 2014 Electric Power Quality and Supply Reliability Conference (PQ) : June 11-13, 2014, Rakvere, Estonia : proceedings2014 / p. 209-214 : ill