00387nam a22001217a 4500008004100000040005500041080002400096100001500120245007000135260003800205300001000243650001200253230221b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a624:624.078.54]bL8  aParnakh, A  aSliding modes and their application in variable structure systems  aMoscow: bMIR Publishers,  c1978  a257p.  aScience