Improved Algorithms for Machine Allocation in Manufacturing Systems. - Hans Frenk; Martine Labbé; Mario van Vliet; Shuzhong Zhang (Oper. Res., 1994)

A unified treatment of single component replacement models. - Hans Frenk; Rommert Dekker; Marcel J. Kleijn (Math. Methods Oper. Res., 1997)

International workshop on smooth and nonsmooth optimization (Rotterdam, July 12-13, 2001). - Jan Brinkhuis; Tibor Illés; Hans Frenk; Georg Still; Gerhard-Wilhelm Weber; Tamás Terlaky (Eur. J. Oper. Res., 2004)

Fractional Programming. - Hans Frenk; Siegfried Schaible (Encyclopedia of Optimization, 2009)