@article{MT_1987_9_a12,
     author = {A. V. Shaidenko},
     title = {``Almost'' cone-preserving mappings},
     journal = {Matemati\v{c}eskie trudy},
     pages = {151--153},
     publisher = {mathdoc},
     volume = {9},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1987_9_a12/}
}