inquiry: base-pair stability constants

[Erik Forbes Y. Hom]

Does anyone know if someone followed up in determining base-pair stability
constants in an aqueous environment - I have a paper: Kyogoku, Y. , et al.
(1969) Biochim Biophys Acta 179:10-17 that determined these constants but
in a deuterochloroform solvent system - which I don't think is entirely
biologically practical.  If someone could give me some references of this
sort, I would be exceedingly grateful.  (Are there any nucleic acid
specialists out there?).

Thanks in advanced,

erik