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@article{AM2_1969__2_182340, author = {A. J. HOFFMAN}, title = {A {Special} {Class} of {Doubly} {Stochastic} {Matrices}}, journal = {Aequationes mathematicae}, pages = {319--326}, publisher = {mathdoc}, volume = {2}, year = {1969}, zbl = {0174.06101}, url = {http://geodesic.mathdoc.fr/item/AM2_1969__2_182340/} }
A. J. HOFFMAN. A Special Class of Doubly Stochastic Matrices. Aequationes mathematicae, Tome 2 (1969), pp. 319-326. http://geodesic.mathdoc.fr/item/AM2_1969__2_182340/