A. S. Householder, A class of methods for inverting matrices, J. Soc. Ind. Appl. Math, vol.6, pp.189-195, 1958.

V. John, H. H. Neumann, and . Gor, Numerical inverting of matrices of high order, Bull. Am. Math. Soc, vol.53, pp.1021-99, 1947.

N. E. Steekrod, The topology of ibre bundles Princeton, 1951.