TY - JOUR AU - Benedict, L AU - Shirley, Eric AU - Bohn, Robert C2 - Physical Review Letters DA - 1998-05-01 LA - en M1 - 80 PB - Physical Review Letters PY - 1998 TI - Optical Absorption of Insulators and the Electron-Hole Interaction: An Ab Initio Calculation UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=841268 ER -