Steffen Zschaler, Pablo Sanchez, Joao Santos, Mauricio Alferez, Awais Rashid, Lidia Fuentes, Ana Moreira, Joao Araujo, Uirá Kulesza. VML* -- A Family of Languages for Variability Management in Software Product Lines. In Software Language Engineering, 2nd Int'l Conf. (SLE 2009), Revised Selected Papers. Volume 5969 of LNCS, Springer, mar 2010.