1. Cognitive variables in series completion;Holzman;Journal of Educational Psychology,1983
2. Empirical tests of a theory of human acquisition of concepts for sequential patterns;Kotovsky;Cognitive Psychology,1973
3. What comes next? The mathematics of pattern in kindergarten;Economopoulos;Teaching Children Mathematics,1998
4. U.K. Department for Education 2017 Statutory framework for the early years foundation stage London, UK http://www.foundationyears.org.uk/files/2017/03/EYFS_STATUTORY_FRAMEWORK_2017.pdf
5. Australian Curriculum, Assessment and Reporting Authority 2015 Foundation to year 10 curriculum: Mathematics http://www.australiancurriculum.edu.au/