1. The nitrogen cycle: processes.;Bernhard;Players, and Human,2010
2. Electrifying the Haber–Bosch.;Capdevila-Cortada;Nat. Catal.,2019
3. Code of Federal Regulations. (2023). Title 7, Subtitle B, Chapter I, Subchapter M, Part 205, Subpart, C. https://www.ecfr.gov/current/title-7/subtitle-B/chapter-I/subchapter-M/part-205?toc=1
4. Atmospheric nitrogen fixation by lightning.;Hill;J. Atmos. Sci.,1980