TY - JOUR AU - S.-I. Chu BT - Physical Review A DA - Jan-08-1975 DO - 10.1103/PhysRevA.12.396 PY - 1975 SP - 396 EP - 405 T2 - Physical Review A TI - Rotational excitation of symmetric-top molecular ions by electron impact UR - http://link.aps.org/doi/10.1103/PhysRevA.12.396 VL - 12 SN - 0556-2791 ER -