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by Ritter, Gerhard A.
by Ritter, Gerhard A.; Deveson, Richard
by Ritter, Gerhard
by Gerhard X. Ritter; Gonzalo Urcid
by Schmidt, Manfred G.; Ritter, Gerhard A.
by Kaburlasos, Vassilis G.; Ritter, Gerhard X.
by Schmalz, Mark S.; Ritter, Gerhard X.; Barrera, Junior; et al.
by Ritter, Gerhard A.; Skinner, Alex
by Ritter, Helge; Sagerer, Gerhard; Dillmann, Rudiger; et al.