Pitis, Dr. Constantin, Dave Carr, Greg Rasmussen, and Cedric Walstra. β€œNew Approach Towards Sustainability – The Global Efficiency Concept (GEff)”. Journal of Environmental Science and Engineering Technology 11 (December 12, 2023): 35–51. Accessed March 15, 2025. https://savvysciencepublishers.com/index.php/jeset/article/view/966.