Opportunities and threats for granting more design space to road contractors. - S. van Herk; Paulien M. Herder; M. J. de Jong; D. S. M. Alma (SMC (5), 2004)

Innovative contracting in infrastructure design and maintenance. - S. van Herk; Paulien M. Herder; W. M. De Jong; D. S. M. Alma (Int. J. Crit. Infrastructures, 2006)