QMR: a quasi-minimal residual method for non-Hermitian linear systems. Roland W. Freund, N.M. Nachtigall (1991/1992) Numerische Mathematik
Quadratically constrained least squares and quadratic problems. Gene H. Golub, Urs von Matt (1991) Numerische Mathematik
Quantum dynamical entropy and an algorithm by Gene Golub. Mantica, Giorgio (2007) ETNA. Electronic Transactions on Numerical Analysis [electronic only]