1. R. A. Adams, “Sobolev Spaces” Academic Press, New York, 1975.
2. O. Axelsson and V. A. Barker, “Finite Element Solution of Boundary Value Problems” Academic Press, New York, 1984.
3. H. T. Banks, Parameter identification techniques for “physiological control systems”, in “Mathematical Aspects of Physiology”, (F. Hop-pensteadt, ed.), AMS Lec. in Applied Math, 19, Providence RI, 1981, pp. 361–383.
4. H. T. Banks, A survey of some problems and recent results for parameter estimation and optimal control in delay and distributed parameter systems, in “Volterra and Functional Differential Equations” (K. Hanngsgen, et al, eds.), Lecture Notes in Pure k, Applied Math. 81, Dekker, New York, 1982, pp. 3 – 24.
5. H. T. Banks, J. M. Crowley, and K. Kunisch, Cubic spline approximation techniques for parameter estimation in distributed systems, IEEE Trans. Auto. Control AC-28(1983), 773 – 786.