@article{DAN_1993_331_4_a0,
     author = {T. M. Abasov and A. M. Rubinov},
     title = {On a class of $\mathbb{H}$-convex functions},
     journal = {Doklady Akademii Nauk},
     pages = {391--392},
     publisher = {mathdoc},
     volume = {331},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_331_4_a0/}
}