M. A. Ferreira et al., "A queue model for idle motorcars management considering an energy sources' new scenario", in Towards A Society with a More Fair Economy or an Economy with a More Social Face: The Contribution of Scientific Social Knowledge to the Alternative Models of Socioeconomic Development, José António Filipe, Nikos Nagopoulos, Kostas Rontos and Ioannis Vavouras, Ed., Hauppauge, New York, USA, Nova Science Publishers, Inc., 2015, vol. 1, pp. 143-152