@article{10_1017_S2040618500035401,
     author = {Farahat, H. K.},
     title = {The semigroup of doubly-stochastic matrices},
     journal = {Glasgow mathematical journal},
     pages = {178--183},
     year = {1966},
     volume = {7},
     number = {4},
     doi = {10.1017/S2040618500035401},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500035401/}
}