Brian Fitzgerald, Kieran Conboy, Ken Power, Ricardo Valerdi, Lorraine Morgan, Klaas-Jan Stol: Lean Enterprise Software and Systems - 4th International Conference, LESS 2013, Galway, Ireland, December 1-4, 2013, Proceedings. Lecture Notes in Business Information Processing 167, Springer 2013, ISBN 978-3-642-44929-1