%0 Journal Article %A A. N. Koryukin %A A. A. Voevoda %T PID controllers of a~two-mass system and complex pairs of multiplicity~2 %J Sibirskij žurnal industrialʹnoj matematiki %D 2015 %P 56-68 %V 18 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJIM_2015_18_1_a4/ %G ru %F SJIM_2015_18_1_a4