@article{SM_2007_198_8_a2,
     author = {V. I. Danchenko},
     title = {Lengths of lemniscates. {Variations} of rational functions},
     journal = {Sbornik. Mathematics},
     pages = {1111--1117},
     publisher = {mathdoc},
     volume = {198},
     number = {8},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2007_198_8_a2/}
}