TY - JOUR PB - American Physical Society ID - 10.1103/PhysRevFocus.13.8 TI - Landmarks: Photons are Real JF - Physical Review Focus JA - Phys. Rev. Focus J1 - FOCUS VL - 13 IS - SP - 8 EP - PY - 2004/02/20/ UR - http://link.aps.org/doi/10.1103/PhysRevFocus.13.8 A1 - Cassidy, David C. ER -