Hougen

Contact Transformations and Determinable Parameters in Spectroscopic Fitting Hamiltonians.

Mekhtiev, Hougen, 2000, Journal of molecular spectroscopy.

Global Analysis of a-, b-, and c-Type Transitions Involving Tunneling Components of K = 0 and 1 States of the Methanol Dimer.

Ohashi, Lovas, Hougen, 1999, Journal of molecular spectroscopy.