TY - JOUR AU - P. Langhoff AU - C. Corcoran BT - Chemical Physics Letters DA - Jan-06-1976 DO - 10.1016/0009-2614(76)85098-1 PY - 1976 SP - 367 EP - 371 T2 - Chemical Physics Letters TI - Tchebycheff-derivative approximations to photoabsorption cross sections in atoms and ions UR - http://linkinghub.elsevier.com/retrieve/pii/0009261476850981 VL - 40 SN - 00092614 ER -