Ummarino, GA. “The Link Between S and D Components of Electron Boson Coupling Constants in One Band D Wave Eliashberg Theory for High Tc Superconductors”. Annals of Mathematics and Physics 6, no. 1 (March 30, 2023): 048–051. Accessed August 27, 2025. https://www.mathematicsgroup.com/amp/article/view/AMP-6-177.