@article{MO_2007_1_a4,
     author = {E. D. Kulanin},
     title = {Rectangular {Triangle}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {18--23},
     year = {2007},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2007_1_a4/}
}