A Basic Solutions Method of Calculating Wave Function of Degenerate Energy Level for Conjugated Molecule
Degenerate Energy Level
The theory of the Stark effect with hyperfine structure for near-degenerate energy levels of an asymmetric rotor
ROTATION-VIBRATION ENERGY LEVELS OF TETRAHEDRAL $XY_{4}$ MOLECULES IN A DEGENERATE VIBRATIONAL STATE v = 1. I. TWOFOLD DEGENERATE VIBRATION $(v_{2} = 1)$
Quantum adiabatic theorem for systems with time-dependent orthogonalization and degenerate energy levels
, 2003