TY - JOUR
AU - I. Percival
BT - Journal of Physics B: Atomic and Molecular Physics
DA - Jan-09-1973
DO - 10.1088/0022-3700/6/9/002
PY - 1973
SP - L229 
EP -  L232
T2 - Journal of Physics B: Atomic and Molecular Physics
TI - Regular and irregular spectra
UR - http://stacks.iop.org/0022-3700/6/i=9/a=002?key=crossref.4f95a72f819b3a947bb2256b30054354
VL - 6
SN - 0022-3700
ER -