1. Jones, B. Frank, Determination of a coefficient in a parabolic differential equation, Part I: existence and uniqueness, J. of Math, and Mech., 11 6, (1962).
2. Jones, B. Frank —, Various methods for finding unknown coefficients in parabolic differential equations, CPAM, XVI (1963).
3. Cannon, J. R., Determination of an unknown coefficient in a parabolic differential equation, Duke Math. J., 302 (1963).
4. Cannon, J. R. —, and DuChateau, P., Determining unknown coefficients in a nonlinear heat conduction problem, SIAM JAP, 24 3 (1973).
5. Cannon, J. R., and DuChateau, P. —, Determination of the conductivity of an isotropic medium, JMAA, 48 3 (1974).