1. D. Bau, D.A. Bau, M. Dawson, C.S. Pickens, Pencil Code: block code for a text world, in: Proceedings of the 14th International Conference on Interaction Design and Children, ACM, 2015, pp. 445–448.
2. Computer science unplugged: school students doing real computing without computers;Bell;N.Z. J. Appl. Comput. Inf. Technol.,2009
3. An experimental study of natural language programming;Biermann;Int. J. Man Mach. Stud.,1983
4. K. Brennan, M. Resnick, New frameworks for studying and assessing the development of computational thinking, in: Proceedings of the 2012 annual meeting of the American Educational Research Association, Vancouver, Canada, 2012.
5. Computational thinking is pervasive;Bundy;J. Sci. Pract. Comput.,2007