@article{VMUMM_1999_4_a2,
     author = {V. Yu. Protasov},
     title = {On possible generalizations of convex addition},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {13--18},
     publisher = {mathdoc},
     number = {4},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1999_4_a2/}
}