Bras-Amorós, M.; Domingo-Ferrer, J.; Torra, V. (2011). "A bibliometric index based on the collaboration distance between cited and citing authors". Journal of Informetrics. 5 (2): 248–264. doi:10.1016/j.joi.2010.11.001. hdl:10261/138172.
Bras-Amorós, M.; Domingo-Ferrer, J.; Torra, V. (2011). "A bibliometric index based on the collaboration distance between cited and citing authors". Journal of Informetrics. 5 (2): 248–264. doi:10.1016/j.joi.2010.11.001. hdl:10261/138172.