%0 Journal Article %A A. V. Borovskikh %T Investigation of Relaxation Oscillations with the Use of Constructive Nonstandard Analysis: I %J Differencialʹnye uravneniâ %D 2004 %P 291-298 %V 40 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2004_40_3_a0/ %G ru %F DE_2004_40_3_a0