@article{johnson_weese_2000, title={Geographic distribution, morphological and molecular characterization, and relationships of Lathrocasis tenerrima (Polemoniaceae)}, volume={60}, number={4}, journal={Western North American Naturalist}, author={Johnson, L. A. and Weese, T. L.}, year={2000}, pages={355–373} }
 @article{johnson_soltis_soltis_1999, title={Phylogenetic relationships of Polemoniaceae inferred from 18S ribosomal DNA sequences}, volume={214}, ISSN={["1615-6110"]}, DOI={10.1007/BF00985732}, number={1-4}, journal={PLANT SYSTEMATICS AND EVOLUTION}, author={Johnson, LA and Soltis, DE and Soltis, PS}, year={1999}, pages={65–89} }