@article{Isao Nakazawa20172017XBL0135, title={Fundamental study on almost periodic frequency arrangements for super-multi-access radio communication systems}, author={Isao Nakazawa and Ken Umeno}, journal={IEICE Communications Express}, volume={6}, number={12}, pages={673-678}, year={2017}, doi={10.1587/comex.2017XBL0135} }