Journal of Mathematical Sciences: Advances and Applications[1] B. T. Cui and Y. Liu, Necessary and sufficient conditions for
oscillation of Robin boundary problems of neutral functional parabolic
equations, J. Comput. Appl. Math. 146(2) (2002), 387-393.
[2] B. T. Cui and W. N. Li, Necessary and sufficient conditions for
oscillation of delay parabolic differential equations with variable
coefficients, J. Math. Technology 16(2) (2000), 6-8 (in Chinese).
[3] B. T. Cui and W. N. Li, A necessary and sufficient condition for
oscillation of parabolic equations with several delays, J. Comput.
Appl. Math. 95 (1998), 153-156.
[4] W. N. Li and B. T. Cui, Necessary and sufficient conditions for
oscillation of delay parabolic differential equations, Southeast Asian
Bull. Math. 26 (2002), 227-234.
[5] W. N. Li and B. T. Cui, Necessary and sufficient conditions for
oscillation of neutral delay parabolic differential equations, Appl.
Math. Comput. 121 (2001), 147-153.
[6] D. P. Mishev and D. D. Bainov, A necessary and sufficient
condition for oscillation of neutral type hyperbolic equations, J.
Comput. Appl. Math. 42 (1992), 215-220.
[7] J. Yan, Comparison theorems for differential equations of mixed
type, Ann. Diff. Eqs. 7 (1991), 316-322.
[8] Q. X. Ye and Z. Y. Li, Theory of Reaction Diffusion Equations,
Science Press, Beijing, 1990 (in Chinese).
[9] Y. H. Yu and W. D. Chen, Oscillation criteria of solutions for
linear parabolic equations of the neutral type, Lecture Notes in Pure
and Applied Mathematics, Marcel Dekker, New York, 176 (1996), 449-466.
