1. Applications of 𝑀-matrices to non-negative matrices;Crabtree, Douglas E.;Duke Math. J.,1966
2. Characteristic roots of 𝑀-matrices;Crabtree, Douglas E.;Proc. Amer. Math. Soc.,1966
3. A matrix identity;Crabtree, D. E.;Amer. Math. Monthly,1968
4. Determination of the inertia of a partitioned Hermitian matrix;Haynsworth, Emilie V.;Linear Algebra Appl.,1968