1. B.K. Amonov, S.P. Shishatski, An a priori estimate of the solution to the Cauchy problem for a second order parabolic equation with data given on the time surface, and related uniquness theorems, Soviet Math. Dokl. 13(1972), 1153–1154.
2. L.E. Andersson, A note on the regularity of the solution of a parabolic equation with discontinuous coefficient, Department of Mathematics, Linköping University, 1983, to appear.
3. J.B. Bell, The noncharacteristic Cauchy problem for a class of equations with time dependence. I. Problem in one space dimension, SIAM J. Math. Anal. 12(1981), 759–777.
4. J.R. Cannon, A priori estimate for continuation of the solution of the heat equation in the space variable, Ann. Mat. Pura Appl. 65(1964), 377–388.
5. J.R. Cannon, A Cauchy problem for the heat equation, Ann. Mat. Pura Appl. 66(1964), 155–166.