@misc{insa2003the,
  title = {The line balancing problem with variable operation times},
  author = {Miralles Insa, Cristóbal Javier and Andrés Romano, Carlos and García Sabater, José Pedro},
  eventtitle = {One World? One view of OM? (Cernobbio, Italia. . 2003)},
  year = {2003}
}