@article{SPS_1978__12__310_0,
     author = {Williams, David},
     title = {The {Q-matrix} problem 3 : the {L\'evy-kernel} problem for chains},
     journal = {S\'eminaire de probabilit\'es de Strasbourg},
     pages = {310--331},
     publisher = {Springer - Lecture Notes in Mathematics},
     volume = {12},
     year = {1978},
     mrnumber = {520009},
     zbl = {0398.60075},
     language = {fr},
     url = {http://www.numdam.org/item/SPS_1978__12__310_0/}
}