Determination of isotope effects on acid-base equilibria by 13C NMR spectroscopyPehk, Tõnis; Kiirend, E.; Lippmaa, Endel; Ragnarsson, U.; Grehn, L.Journal of the Chemical Society. Perkin transactions1997 / 2, p. 445-450

General approach to measurements of pKa differences by C NMR spectroscopyPehk, Tõnis; Kiirend, E.; Lippmaa, Endel; Ragnarsson, U.Journal of the Chemical Society. Perkin transactions1996 / 2, p. 2351-2367