On the design of a hierarchical SS7 network: a graph theoretical approach. - Lutz Krauss; Gerhard Rufa (IEEE J. Sel. Areas Commun., 1994)

Congestion and flow control in Signaling System No. 7-impacts of intelligent networks and new services. - Joachim Zepf; Gerhard Rufa (IEEE J. Sel. Areas Commun., 1994)

Developments in telecommunications - with a focus on SS7 network reliability. - Gerhard Rufa (Springer, 2008)