@article{DAN_1987_297_3_a8,
     author = {\`E. R. Tsekanovskii},
     title = {Triangular models of unbounded accretive operators and the regular},
     journal = {Doklady Akademii Nauk},
     pages = {552--556},
     publisher = {mathdoc},
     volume = {297},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_3_a8/}
}