Solving linear least squares by orthogonal factorization and pseudoinverse computation via the modified Huang algorithm in the ABS class. - Emilio Spedicato; Elena Bodon (Computing, 1989)

Solution of linear least squares via the ABS algorithm. - Emilio Spedicato; Elena Bodon (Math. Program., 1993)

ABS methods and ABSPACK for linear systems and optimization: A review. - Emilio Spedicato; Elena Bodon; Antonino Del Popolo; Nezam Mahdavi-Amiri (4OR, 2003)

ABS methods for continuous and integer linear equations and optimization. - Emilio Spedicato; Elena Bodon; Zun-Quan Xia; Nezam Mahdavi-Amiri (Central Eur. J. Oper. Res., 2010)