درخواست مقاله از science direct قبل از سال 1990

اگه ممکنه منو در پیدا کردن این مقالات کمک کنید . متشکرم .
1-L.J. Watford, The Schur complement of a generalized M-matrix, Linear Algebra Appl. 5 (1972) 247–255

2--R.J. Stern, M. Tsatsomeros, Extended M-matrices and subtangentiality, Linear Algebra Appl. 97 (1987) 1–11

3-H. Schneider, Theorems on M-splittings of a singular M-matrix which depend on graph structure, Linear Algebra Appl. 58 (1984) 407–424

4-Fiedler, T.L. Markham, A Characterization of the closure of inverse M-Matrices, Linear Algebra Appl. 105(1988) 209–223

5-C.R. Johnson, Inverse M-matrices, Linear Algebra Appl. 47 (1982) 195–216

6-C.R. Johnson, Closure properties of certain positivity classes of matrices under various algebraic operations, LinearAlgebra Appl. 97 (1987) 243–247

7-M. Fiedler, C.R. Johnson, T.L. Markham, Notes on inverse M-Matrices, Linear Algebra Appl. 91 (1987) 75–81

8-M. Fiedler, Characterizations of MMA-matrices, Linear Algebra Appl. 106 (1988) 233–244