TY - JOUR
AU - David Hummer
AU - G. Rybicki
BT - The Astrophysical Journal
DA - Jan-12-1982
DO - 10.1086/160560
PY - 1982
EP - 925
T2 - The Astrophysical Journal
TI - Second-order escape probability approximations in radiative transfer
UR - http://articles.adsabs.harvard.edu/full/1982ApJ...263..925H
VL - 263
SN - 0004-637X
ER -