@article{INTO_1999_65_a0,
     author = {A. V. Dmitruk},
     title = {Quadratic sufficient conditions for the minimality of abnormal {sub-Riemannian} geodesics},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {5--89},
     year = {1999},
     volume = {65},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_1999_65_a0/}
}