1. Barenblat, G., Zeltov, I., and Kochiva, I. "Basic concepts in the theory of seepage of homogeneous fluids in fissured rock", J. Appl. Math. Mech. 24(1960), 1286–1303.
2. Bergman, S. "Integral Operators in the Theory of Linear Partial Differential Equations", Springer-Verlag, Berlin, 1961.
3. Bhatnagar, S., and Gilbert, R.P. "Bergman type operators for pseudoparabolic equations in several space variables", Bull. Mat. Soc. Mat. Rep. Soc. Rom. 18 (66) (1974).
4. Bhatnagar, S., and Gilbert, R.P. "A function theoretic approach to higher order pseudoparabolic equations", Math. Nachrichten (to appear).
5. Bhatnagar, S., and Gilbert, R.P. "Constructive methods for solving Δ
4
2
u+AΔ4ut+But+CΔ4u+Du=0", Math. Nachrichten (to appear).