Biggs JB and Collis KF. Evaluating the Quality of Learning. New York & Sydney: Academic Press, 1982
Hattie JAC, Brown GTL. Assessment Tools for Teaching and Learning Technical Report #43. Cognitive Process in as TTle: the SOLO Taxonomy (online). http://www.tki.org.nz/r/asttle/pdf/technical-reports/techreport43.pdf [2 August 2010].
Brabrand B, Dahl B. Using the SOLO taxonomy to analyze competenceprogression of university science curricula. Higher Educ 58: 531-549, 2009.
E. S. Prakash, K. A. Narayan, and K. R. Sethuraman Student perceptions regarding the usefulness of explicit discussion of Structure of the Observed Learning Outcome” taxonomy Adv Physiol Educ 34: 145-149, 2010