Keramatee, M., Zadegholaam, Z., Khoramee, Z., Alaahyaaree, R. (2008). 'The impact of value engineering as a managerial method on the mathematics achievement of 7th graders in Mashad', The Journal of New Thoughts on Education, 4(3), pp. 9-28. doi: 10.22051/jontoe.2008.230