TY - JOUR
AU - Yves Justum
AU - A. Maquet
AU - Y. Heno
BT - Physical Review A
DA - Jan-03-1990
DO - 10.1103/PhysRevA.41.2791
PY - 1990
SP - 2791
EP - 2795
T2 - Physical Review A
TI - Gauge invariance and approximate multiphoton calculations in hydrogen
UR - http://link.aps.org/doi/10.1103/PhysRevA.41.2791
VL - 41
SN - 1050-2947
ER -