@article{IVM_1990_3_a11,
     author = {K. \`E. Kalyamanova},
     title = {Rational tetrahedra},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {73--75},
     year = {1990},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1990_3_a11/}
}