Bruce E. Litow On Efficient Deterministic Simulation of Turing Machine Computations Below Logspace. [Citation Graph (0, 0)][DBLP] Mathematical Systems Theory, 1985, v:18, n:1, pp:11-18 [Journal]
Kevin A. Grasse Structure of the Boundary of the Attainable Set in Certain Nonlinear Systems. [Citation Graph (0, 0)][DBLP] Mathematical Systems Theory, 1985, v:18, n:1, pp:57-77 [Journal]