@article{MO_2015_3_a3,
     author = {A. Preris},
     title = {On the notion of form},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {35--38},
     year = {2015},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2015_3_a3/}
}