V. Savitski, A. M. Malyarevich, P. V. Prokoshin, K. V. Yumashev, E. Raaben, and A. A. Zhilin, "PbS doped glass passive saturable absorbers for mode locked and Q-switched solid state lasers at 1.06 and 1.54 mm,"
in Advanced Solid-State Lasers, C. Marshall, ed.,
Vol. 50 of OSA Trends in Optics and Photonics
(Optical Society of America, 2001), paper WB4.