@article{TMF_1987_72_3_a9,
     author = {G. P. Pron'ko},
     title = {Quantum string theory in four-dimensional space-time},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {424--435},
     publisher = {mathdoc},
     volume = {72},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_72_3_a9/}
}