TY - JOUR AU - Sydney Geltman BT - Physical Review A DA - Jan-09-1995 DO - 10.1103/PhysRevA.52.2468 PY - 1995 SP - 2468 EP - 2471 T2 - Physical Review A TI - Strong-field ionization of helium in the independent-electron model VL - 52 SN - 1050-2947 ER -