@article {IOPORT.50256565,
    author       = {Nash, J. C. and Wang, R. L. C.},
    title        = {Algorithm 645: subroutines for testing programs that compute the generalized inverse of a matrix},
    year         = {1986},
    journal      = {ACM Trans. Math. Softw.},
    volume       = {12},
    number       = {3},
    pages        = {274-277},
    doi          = {10.1145/7921.214334},
    identifier   = {50256565},
}