%0 Journal Article %A V. I. Danchenko %T Lengths of lemniscates. Variations of rational functions %J Sbornik. Mathematics %D 2007 %P 1111-1117 %V 198 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2007_198_8_a2/ %G en %F SM_2007_198_8_a2