1. Use of a constant time delay procedure in teaching preschoolers in a group format;Alig–Cybriwsky;Journal of Early Intervention,1990
2. Vocational Habilitation of Severely Retarded Adults;Bellamy,1979
3. Procedural reliability;Billingsley;Behavioral Assessment,1980
4. A comparison of in vivo and simulation prior to in vivo instruction in teaching generalized safety skills;Collins;Education and Training in Mental Retardation,1993
5. Use of constant time delay in small group instruction;Doyle;The Journal of Special Education,1990