C. Pinto et al., "The Portuguese Railway Assembly Industry: Recent Causes of Network Disruption and Decay", in Joint Conf. of the 15th Annu. international Conf. on Advances in Management and 1st Annu. Int. Conf. on Social Intelligence, ICAM (International Conferences on Advances in Management ), Ed., Boston, ICAM (International Conferences on Advances in Management ), 2008, pp. 20-22