Noviani, Elisabeth Pratidhina Founda, and Wipsar Sunu Brams Dwandaru. “An Extension of Gibbs Variational Principle for Canonical Partition Function”. Jurnal Sains Dasar 2, no. 1 (September 24, 2014). Accessed July 9, 2025. https://journal.uny.ac.id/index.php/jsd/article/view/3577.