Ressmann, A., Schneider, M., Gärtner, P., Weil, M., & Bica, K. (2017). Design and synthesis of basic ionic liquids for the esterification of triterpenic acids. Monatshefte Für Chemie - Chemical Monthly, 148(1), 139–148. https://doi.org/10.1007/s00706-016-1889-1