@article{DAN_1990_311_4_a1,
     author = {{\DJ}o Cong Khanh},
     title = {Minimality of passive scattering systems under cascade coupling},
     journal = {Doklady Akademii Nauk},
     pages = {780--783},
     publisher = {mathdoc},
     volume = {311},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_4_a1/}
}