@article{DAN_1989_305_1_a1,
     author = {M. S. Almamedov},
     title = {Proper products of multiparametric {Sturm{\textendash}Liouville} matrix equations},
     journal = {Doklady Akademii Nauk},
     pages = {14--17},
     year = {1989},
     volume = {305},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_305_1_a1/}
}