Granularity and reusability of learning objects - Silveira, Ismar Frango; Araujo Filho, Carlos Fernando de; Amaral, Luiz Henrique; Oliveira, Ivan Carlos Alcântara de; Schimiguel, Juliano; Ledón, Manuel Fernández-Paradela; Ferreira, Maria Alice Grigas Varella (Learning Objects & Instructional Design, 2007)