TY - JOUR AU - Castelletto, Stefania AU - Degiovanni, Ivo AU - Migdall, Alan AU - Ware, M C2 - New Journal of Physics DA - 2004-01-01 00:01:00 LA - en PB - New Journal of Physics PY - 2004 TI - On the Measurement of Two-Photon Single-Mode Coupling Efficiency in PDC Photon Sources ER -