@article{2003, title={Long-Range Prediction of Population by Sex and Age in Each District
Based on Fuzzy Theory}, author={Pyong Sik Pak and Gwan Kim}, journal={IEEJ Transactions on Electronics, Information and Systems}, volume={123}, number={7}, pages={1319-1326}, year={2003}, doi={10.1541/ieejeiss.123.1319} }