SMEs behavior in the air cargo supply chain : engagement, performance and strategy. A regional approach on SMEs practices and future directions in Mecklenburg-VorpommernBeifert, Anatoli; Maknyte, Laima; Prause, Gunnar KlausSocial Sustainability and Economic Security : The Agenda for Entrepreneurship in the 21st Century2013 / p. 13.01-13.20