Observability of systems:

D. I. Wallace, Observability, Predictability and Chaos, Progress in Systems and Control Theory 1, Birkhauser, Boston, (1988)

D. I. Wallace and Joseph Wolf, Observability of Evolution Equations for Invariant Differential Operators, Journal of Mathematical Systems and Control, 1, (1991)

D. I. Wallace and Joseph Wolf, Acuity of Observation for Invariant Evolution Equations, Progress in Systems and Control Theory 11

Alisa DeStefano, Steven Kaliczewski and D. I. Wallace,, Acuity of Observation for the Heat Equation on a Bounded Domain, Progress in Systems and Control Theory, 20, pp. 115-126, 1995

D. I. Wallace, Placement of Observation Points for Invariant Evolution Equations, Progress in Systems and Control Theory, 15, 1993

Applied analysis:

D. I. Wallace and Ryuji Yamaguchi, The Radon transform on SL(2,R)/SO(2, R), Trans. Amer. Math. Soc. 297, (1986), 305-318.

Dennis Healy and D. I. Wallace, Periodic solutions of differential equations on unipotent groups using Lie group deformations, J. Mathematical Systems, Estimation and Control, 1, (1991), 465-485

A. DeStefano, P. Kostelec and D. I. Wallace, Interpolating uniquely with only a finite class of polynomials, Proc. MTNS '89

D. I. Wallace, Signal Processing and the Jacobi Group, Progress in Systems and Control Theory 20, pp. 345-355, 1995

D. I. Wallace, Arithmetic Properties of Observable Time Dependent Systems, New Directions in Controls and Applications, Series: Lecture Notes in Control and Information Sciences, ed. Lindquist, Dayawansa, Zhou, Springer, 2005, p. 379

Discrete systems:

Philip Tiu and D. I. Wallace, Norm-quadratic residue codes, I.E.E.E. Trans. Inform. Theory, 40, pp. 946-949, 1994

Clyde Martin and D. I. Wallace, Quadrature schemes for a general family of functions, Applied Mathematics and Computation, Vol 77, Issue 2, 2004, pp 581-588

Audrey Terras and D. I. Wallace, Selberg's Trace Formula on the k-regular Tree and Applications, International Journal of Mathematics and Mathematical Sciences, IJMMS 2003:8 (2003) 501-526

Clyde Martin, Mark Stamp and D. I. Wallace, A Characterization of a Class of Discrete Nonlinear Feedback Systems, Communications in Information and Systems, Vol. 5, No. 1, 2005

D. I. Wallace and Walker White, Pseudoprime Factorizations of Integer Matrices, Linear Algebra and its Applications 429, Issue 1, 1 2008, Pages 142-155