Paper  doi  bibtex   

@article{sanderson_estimating_2002,
	title = {Estimating absolute rates of molecular evolution and divergence times: a penalized likelihood approach},
	volume = {19},
	issn = {1537-1719, 0737-4038},
	shorttitle = {Estimating {Absolute} {Rates} of {Molecular} {Evolution} and {Divergence} {Times}},
	url = {http://academic.oup.com/mbe/article/19/1/101/1066733},
	doi = {10.1093/oxfordjournals.molbev.a003974},
	language = {en},
	number = {1},
	urldate = {2019-03-05},
	journal = {Molecular Biology and Evolution},
	author = {Sanderson, Michael J.},
	month = jan,
	year = {2002},
	pages = {101--109},
}