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2. Comparison of progressive and constant time-delay procedures in teaching community-sign word reading;Ault;American Journal on Mental Deficiency,1988
3. The development of imitation by reinforcing behavioral similarity to a model;Baer;Journal of the Experimental Analysis of Behavior,1967
4. Behavior Analyst Certification Board 2010 Guidelines for responsible conduct for behavior analysts http://www.bacb.com/Downloadfiles/BACBguidelines/1007guidelinesFpdf.pdf
5. On the relation of mands and the function of destructive behavior;Bowman;Journal of Applied Behavior Analysis,1997