Template:Brunton & Sokoloff, 2020a
- Brunton, D.F. & Sokoloff, P.C. 2020. A Review of North American Isoetes engelmannii (Isoetaceae) complex hybrids, including the description of I. ×fernaldii, hyb. nov. and I. ×karenae, hyb. nov. Webbia 75(1): 35–50. DOI: 10.36253/jopt-8355 ResearchGate