Stewart, James J. P. (1990). "MOPAC: A semiempirical molecular orbital program". Journal of Computer-Aided Molecular Design. 4 (1): 1–103. doi:10.1007/BF00128336. PMID2197373.
Freire, Ricardo O.; Simas, Alfredo M. (2010). "Sparkle/PM6 Parameters for all Lanthanide Trications from La(III) to Lu(III)". Journal of Chemical Theory and Computation. 6 (7): 2019–2023. doi:10.1021/ct100192c.
Klamt, A.; Schüürmann, G. (1993). "COSMO: a new approach to dielectric screening in solvents with explicit expressions for the screening energy and its gradient". Journal of the Chemical Society, Perkin Transactions 2. 1993 (5): 799–805. doi:10.1039/P29930000799.
Stewart, James J. P. (2000). "A practical method for modeling solids using semiempirical methods". Journal of Molecular Structure. 556 (1–3): 59–67. doi:10.1016/S0022-2860(00)00651-7.
Stewart, James J. P. (1996). "Application of localized molecular orbitals to the solution of semiempirical self-consistent field equations". International Journal of Quantum Chemistry. 58 (2): 133–146. doi:10.1002/(SICI)1097-461X(1996)58:2<133::AID-QUA2>3.0.CO;2-Z.
Stewart, James J. P. (1989). "Optimization of parameters for semiempirical methods I. Method". Journal of Computational Chemistry. 10 (2): 209–220. doi:10.1002/jcc.540100208.
Clark, Timothy (1988). "Molecular Orbital and Force-Field Calculations for Structure and Energy Predictions". Physical Property Prediction in Organic Chemistry: 95–102. doi:10.1007/978-3-642-74140-1_9. ISBN978-3-642-74142-5.
Stewart, James J. P. (1990). "MOPAC: A semiempirical molecular orbital program". Journal of Computer-Aided Molecular Design. 4 (1): 1–103. doi:10.1007/BF00128336. PMID2197373.