@article{TMF_1990_84_3_a1,
     author = {G. L. Stavraki},
     title = {Discrete operator fields as~carriers of~causal spacetime structure. {Internal} symmetry},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {339--352},
     publisher = {mathdoc},
     volume = {84},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_84_3_a1/}
}