@article{TMF_1990_85_2_a1,
     author = {B. M. Barbashov and A. P. Koshkarov},
     title = {Open string in~background {non-Abelian} field},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {176--182},
     year = {1990},
     volume = {85},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_85_2_a1/}
}