Paul Concus, Dianne P. O'Leary, Gene H. Golub. A generalized conjugate gradient method for the numerical solution of elliptic partial differential equations. In Raymond Hon-Fu Chan, Chen Greif, Dianne P. O'Leary, editors, Milestones in Matrix Computation - Selected Works of Gene H. Golub, with Commentaries. pages 79-101, Oxford University Press, 2007.
Abstract is missing.