@inproceedings{Onward-2019-KaminaA,
	author        = "Tetsuo Kamina and Tomoyuki Aotani",
	booktitle     = "{Proceedings of the Ninth Symposium on New Ideas, New Paradigms, and Reflections on Programming and Software}",
	doi           = "10.1145/3359591.3359730",
	isbn          = "978-1-4503-6995-4",
	pages         = "17--31",
	publisher     = "{ACM}",
	title         = "{An approach for persistent time-varying values}",
	year          = 2019,
}