@article{SM_1975_25_1_a6,
     author = {\`E. R. Rozendorn},
     title = {A~sufficient condition for global regularity of nets of curves in the {Euclidean} plane},
     journal = {Sbornik. Mathematics},
     pages = {111--127},
     year = {1975},
     volume = {25},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_25_1_a6/}
}