@article{DAN_1989_304_5_a19,
     author = {Fam Le Kien},
     title = {Multiphoton $N$-level $(N-1)$-mode system with combined configuration of transitions},
     journal = {Doklady Akademii Nauk},
     pages = {1112--1115},
     publisher = {mathdoc},
     volume = {304},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_304_5_a19/}
}