@article{DAN_1966_167_4_a18,
     author = {Nguyẽn V\u{a}n Hi\^eu and A. N. Tavkhelidze},
     title = {On the unitarity of the $S$-matrix in the disturbed $SL(6)$ symmetry},
     journal = {Doklady Akademii Nauk},
     pages = {792--794},
     publisher = {mathdoc},
     volume = {167},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_167_4_a18/}
}