@inproceedings {pinol-spp-2009,
	title = {Obtaining finite populations in a Verhulst-free 8-bit Penna model with periodic change in reproduction},
	booktitle = {Proceedings of the 27th Samahang Pisika ng Pilipinas Physics Congress},
	year = {2009},
	month = {28{\textendash}30 Oct 2009},
	pages = {SPP-2009-033},
	address = {Development Academy of the Philippines Convention Center, Tagaytay City},
	abstract = {<div>Periodic changes in reproduction age slow down population growth or decay. The minimum reproductive age in an 8-bit, Verhulst-free Penna model varied repeatedly between two values. It is an invariable characteristic of an individual which is set at birth. A steady state is found when the period for the smaller reproductive age is slightly longer.</div>},
	author = {Chrysline Margus Pi{\~n}ol and Ronald S. Banzon}
}