1. Basic counting principles used by mentally retarded children;Baroody;Journal for Research in Mathematics Education,1986
2. Counting ability of moderately and mildly handicapped children;Baroody;Education and Training in Mental Retardation,1986
3. The development of counting strategies for single-digit addition;Baroody;Journal for Research in Mathematics Education,1987
4. Self-invented addition strategies by children with mental retardation;Baroody;American Journal on Mental Retardation,1996