@article{TIMB_2006_14_2_a4,
     author = {V. V. Gorokhovik},
     title = {Second order tangent vectors to sets and minimality conditions for points of subsets of ordered normed spaces},
     journal = {Trudy Instituta matematiki},
     pages = {35--47},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2006_14_2_a4/}
}