@article{MZM_1990_48_1_a5,
     author = {A. S. Kochurov},
     title = {Absolute diameters and codiameters},
     journal = {Matemati\v{c}eskie zametki},
     pages = {38--46},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_48_1_a5/}
}