%0 Journal Article %A Thurston, H. S. %T On factoring a matric polynomial with scalar coefficients %J Compositio Mathematica %D 1939 %P 235-238 %V 6 %I Johnson Reprint Corporation %U http://www.numdam.org/item/CM_1939__6__235_0/ %G en %F CM_1939__6__235_0