TY - JOUR AU - David Hummer BT - Journal of Quantitative Spectroscopy and Radiative Transfer DA - Jan-01-1968 DO - 10.1016/S0022-4073(68)80108-6 PY - 1968 SP - 193 EP - 217 T2 - Journal of Quantitative Spectroscopy and Radiative Transfer TI - Summary-introduction to radiative transfer problems in stellar atmospheres VL - 8 SN - 00224073 ER -