TY - JOUR
AU - Sydney Geltman
BT - Journal of Physics B: Atomic and Molecular Physics
DA - Feb-09-1984
DO - 10.1088/0022-3700/16/17/004
PY - 1983
SP - L525 
EP -  L528
T2 - Journal of Physics B: Atomic and Molecular Physics
TI - Threshold behaviour for ionisation by electrons and positrons
VL - 16
SN - 0022-3700
ER -