Learning Object Composition: the role of Sign Types. - Herli J. de Menezes; Sean W. M. Siqueira; Leila C. V. de Andrade (AMCIS, 2011)

Sequencing Learning Objects: Space-time, Semiotic and Pedagogical Constraints. - Herli J. de Menezes; Sean W. M. Siqueira; Leila C. V. de Andrade (ICALT, 2011)