Minh Tan, Phan, Nguyen Thanh Lam, and Minh Tho Nguyen. 1999. “HEATS OF FORMATION OF COMPOUNDS: QUANTUM CALCULATIONS INSTEAD OF EXPERIMENTAL METHODS”. Science and Technology Development Journal 2 (4&5), 84-89. https://doi.org/https://doi.org/10.32508/stdj.v2i4&5.3633.