Buchkapitel
Yurchenko, S. N.;
Thiel, W.;
Carvajal, M.;
Lin, H.;
Jensen, P. Rotation-vibration motion of pyramidal XY₃ molecules described in the Eckart frame: The calculation of intensities with application to NH₃. In
ADVANCES IN QUANTUM CHEMISTRY; Advances in Quantum Chemistry; ELSEVIER ACADEMIC PRESS INC: SAN DIEGO, 2005; S 209–238.