@article{1183537427,
author = {Williams, David},
title = {The $Q$-matrix problem for Markov chains},
journal = {Bull. Amer. Math. Soc.},
volume = {81},
number = {4},
year = {1975},
pages = { 1115-1118},
language = {en},
url = {http://dml.mathdoc.fr/item/1183537427}
}
Williams, David. The $Q$-matrix problem for Markov chains. Bull. Amer. Math. Soc., Tome 81 (1975) no. 4, pp. 1115-1118. http://gdmltest.u-ga.fr/item/1183537427/