Portmann, Stefan, and Hans Peter Lüthi. “MOLEKEL: An Interactive Molecular Graphics Tool”. CHIMIA, vol. 54, no. 12, 2000, p. 766, https://doi.org/10.2533/chimia.2000.766.
Portmann, S., & Lüthi, H. P. (2000). MOLEKEL: An Interactive Molecular Graphics Tool. CHIMIA, 54(12), 766. https://doi.org/10.2533/chimia.2000.766