Volker Nissen Maik Günther René Schumann Integrated Generation of Working Time Models and Staff Schedules in Workforce Management. 491-500 2011 EvoApplications (2) http://dx.doi.org/10.1007/978-3-642-20520-0_50 conf/evoW/2011a2 db/conf/evoW/evoappl2011-2.html#NissenGS11