Enabling the Collaborative Construction and Reuse of Knowledge through a Virtual Reference Environment. - J. Alfredo Sánchez 001; Alberto García; Carlos Proal; Lourdes Fernández (CRIWG, 2001)

Visual exploration of large collections in digital libraries. - Nabani N. Silva; J. Alfredo Sánchez 001; Carlos Proal; Christian Rebollar (CLIHC, 2003)

Supporting Structured, Semi-Structured and Unstructured Data in Digital Libraries. - J. Alfredo Sánchez 001; Carlos Proal; M. Fernanda Maldonado-Naude (ENC, 2004)