ISHS History: The ASU Years Plus by Alleen and Don Nilsen a.k.a. Momma and Poppa Bear 1.
L.Natalucci,WHIM Conference, Roma, 17-18 Jan 2006 CZT Wide Field Gamma-Camera for ESTREMO P.Ubertini, L.Natalucci, E.M. Quadrini and collaborators IASF/INAF.