Author	Title	Journal	ISSN	Publisher	Date	Volume	Number	Page	URL	URL(DOI)
Ikeda  Kiyohiko	The Relation of Density Dependence and Density Independence to Population Size and the Concept of Caution Density of Extinction for Wild Animals	Memoirs of the Faculty of Liberal Arts & Education. Part II, Mathematics & natural sciences	03858766	University of Yamanashi	1985-00-00	36		53-55	http://ci.nii.ac.jp/naid/110000359257/en/