Purnomo, Yoppy Wahyu dan Widowati, Chairunnisa dan Aziz, Tian Abdul dan Pramudiani, Puri  (2017) Fractions Division Knowledge of Elementary School Student: The Case of Lala.  In: 4th International Conference on Research, Implementation and Education of Mathematics and Science, 15 - 16 May 2017, Faculty of Mathematics and Natural Science, Yogyakarta State University, Yogyakarta.