Paper  doi  bibtex   

@article{perry_geophysical_2000,
	title = {Geophysical, archaeological, and historical evidence support a solar-output model for climate change},
	volume = {97},
	url = {https://doi.org/10.1073/pnas.230423297},
	doi = {10.1073/pnas.230423297},
	journal = {Proc Natl Acad Sci U S A},
	author = {Perry, C. A. and Hsu, K. J.},
	year = {2000}
}