Whiteside, Mark, and J. Marvin Herndon. “Humic Like Substances (HULIS): Contribution to Global Warming and Stratospheric Ozone Depletion”. European Journal of Applied Sciences 11, no. 2 (March 30, 2023): 325–346. Accessed November 21, 2024. https://journals.scholarpublishing.org/index.php/AIVP/article/view/14363.