[1] McDermott, L.C. & Redish, E.F. (1999). Resource letter: PER-1: Physics education research. American Journal of Physics, 67 (9), 755-767.
[2] English, L., D. (1997). The Development of Fifth-Grade Children’s Problem Posing Abilities, Educational Studies in Mathematics, 34 (3), pp.183-217
[3] Silver, E. and Cai, J. (1996). An Analyses of Arithmetic Problem Posing by Middle School Students, Journal of Research in Mathematics Education, 27 (5), pp.521-539
[4] Gonzales, N. A. (1994). Problem Posing: A Neglected Component in Mathematics Courses for Prospective Elementary and Middle School Teachers, School Science and Mathematics, 94 (2),pp.78–84.
[5] Grunmeier, T.A.(2002). University Students’ Problem Posing Abilities and Attitudes Towards Mathematics, PRIMUS, 12(2), pp.122-134.
[6] Stoyanova, E. (2005). Problem Posing Strategies used by years 8 and 9 students, Australian Mathematics Teacher, 61 (3), pp.6-11.
[7] Silver, E. and Chi, J. (1995). Appepping students’ mathematical problem posing, Teaching Children Mathematics, 12 (3), pp.129-135