Haupt, Irene, “Composer Steve Reich and conductor Brad Lubman applaud the members of the Signal Ensemble after a performance of Reich's Double Sextet at June in Buffalo 2010. From left to right after Lubman: pianist Oliver Hagen, percussionists Doug Perkins and David Sk,” Digital Collections - University at Buffalo Libraries, accessed February 28, 2021, https://digital.lib.buffalo.edu/items/show/14541.