Updating of conjugate direction matrices using members of Broyen's family. - Dirk Siegel (Math. Program., 1993)

Modifying the BFGS update by a new column scaling technique. - Dirk Siegel (Math. Program., 1994)

Implementing and modifying Broyden class updates for large scale optimization. - Martin D. Buhmann; Dirk Siegel (Comput. Optim. Appl., 2021)