An Efficient Multi-request Route Planning Framework Based on Grid Index and Heuristic Function - Jiajia Li; Jiahui Hu; Vladislav Engel; Chuanyu Zong; Xiufeng Xia (Advanced Data Mining and Applications - 15th International Conference, ADMA 2019, Dalian, China, November 21-23, 2019, Proceedings, 2019)