David L. Russell State Restoration in Systems of Communicating Processes. [Citation Graph (1, 0)][DBLP] IEEE Trans. Software Eng., 1980, v:6, n:2, pp:183-194 [Journal]
Kangsheng Liu, David L. Russell New Meaning of Exact Controllability of Linear Sytems in Hilbert Spaces. [Citation Graph (0, 0)][DBLP] Control of Distributed Parameter and Stochastic Systems, 1998, pp:103-110 [Conf]