@article{RM_1973_28_3_a3,
     author = {M. H. Zakhar-Itkin},
     title = {The matrix {Riccati} differential equation and the semi-group of linear fractional transformations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {89--131},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1973_28_3_a3/}
}