Yerizon, Y., Ahda, Y. and Amsari, D. (2019) “The influence of contextual approach to students’ problem solving ability of Class IX of SMP Negeri 1 Bayang”, EDUCATUM Journal of Science, Mathematics and Technology, 6(2), pp. 1–8. doi: 10.37134/ejsmt.vol6.2.1.2019.