@article{SM_1973_19_2_a2,
     author = {Yu. S. Ilyashenko},
     title = {On the rectification and circle formation problems},
     journal = {Sbornik. Mathematics},
     pages = {177--189},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_19_2_a2/}
}