A. Ben-israel and T. Greville, Generalized inverses: theory and applications, CMS Books in Mathematics, 2003.

A. Escande, N. Mansard, and P. Wieber, Hierarchical quadratic programing: Fast online humanoid robot motion generation, Int. Journal of Robotics Research, 2013.
DOI : 10.1177/0278364914521306
URL : https://hal.archives-ouvertes.fr/hal-00751924/file/m.pdf

G. Golub and C. Van-loan, Matrix computations, chap. 5.1: Householder and Givens Matrices, 1996.

G. Golub and C. Van-loan, Matrix computations, chap. 5.5: The rankdeficient LS problem, 1996.