Models, Mindsets, Meta: The What, the How, and the Why Not? Essays Dedicated to Bernhard Steffen on the Occasion of His 60th Birthday - Margaria, Tiziana; Margaria, Tiziana; Graf, Susanne; Graf, Susanne; Larsen, Kim G.; Larsen, Kim G. (Springer International Publishing : Imprint: Springer, 2019)