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* [[Mark H. Ashcraft|Ashcraft, M. H.]] (1978). Cognitive arithmetic: Evidence for retrieval and decision processes in mental addition.- In: Journal of Experimental Psychology: Human Learning and Memory, Vol. 4, S. 527-538. | * [[Mark H. Ashcraft|Ashcraft, M. H.]] (1978). Cognitive arithmetic: Evidence for retrieval and decision processes in mental addition.- In: Journal of Experimental Psychology: Human Learning and Memory, Vol. 4, S. 527-538. | ||
* [[Mark H. Ashcraft|Ashcraft, M. H.]] & [[Kelly S. Christy| Christy, K. S.]] (1995). The Frequency of Arithmetic Facts in | * [[Mark H. Ashcraft|Ashcraft, M. H.]] & [[Kelly S. Christy| Christy, K. S.]] (1995). The Frequency of Arithmetic Facts in Elementary Texts: Addition and Multiplication in Grades 1-6.- In: Journal for Research in Mathematics Education, Vol. 26, No. 5, S. 396-421. | ||
Elementary Texts: Addition and Multiplication in Grades 1-6.- In: Journal for Research in Mathematics Education, Vol. 26, No. 5, S. 396-421. | |||
* [[Mark H. Ashcraft|Ashcraft, M. H.]] & [[Bennett A. Fierman| Fierman, B. A.]] (1982). Mental Addition in Third, Fourth, and Sixth Graders.- In: Journal of Experimental Child Psychology, Vol. 33, S. 216-234. | * [[Mark H. Ashcraft|Ashcraft, M. H.]] & [[Bennett A. Fierman| Fierman, B. A.]] (1982). Mental Addition in Third, Fourth, and Sixth Graders.- In: Journal of Experimental Child Psychology, Vol. 33, S. 216-234. |