Template:Simpson, Helfgott & Neff, 2001
- Simpson, B.B., Helfgott, D.M. & Neff, J.L. 2001. A New Cryptic Species of Nemophila (Hydrophyllaceae) from Texas and the Leptotypification of N. phacelioides Nuttall. Lundellia 2001(4): 30-36. DOI: 10.25224/1097-993X-4.1.30
