@article{TMF_1993_97_2_a0,
     author = {A. K. Motovilov},
     title = {Algebraic version of extension theory for a~quantum system with internal structure},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {163--181},
     publisher = {mathdoc},
     volume = {97},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1993_97_2_a0/}
}