@article{MO_2010_1_a5,
     author = {S. V. Dvoryaninov},
     title = {On {Superposition} {Principles}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {31--35},
     year = {2010},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2010_1_a5/}
}