A high performance graphics system for the CRAY-1. - Robert H. Ewald; Lynn D. Maas (SIGGRAPH, 1978)

President's information technology advisory committee (PITAC): subcommittee on transforming the government. - David Cooper; Bo Ewald (DG.O, 2000)

An Introduction to Quantum Computing and Its Application. - Robert H. Ewald (QTOP@NetSys, 2017)