@article {liang2021review,
	title = {A review of effective-strain based and multi R-ratio crack propagation models and a comparison of simulated results using the two approaches},
	journal = {International Journal of Fatigue},
	volume = {142},
	year = {2021},
	pages = {105920},
	publisher = {Elsevier},
	author = {Liang, W and Conle, FA and Topper, TH and Walbridge, S}
}