[1] Guzmán M.: Differentiation of integrals in $R\sp{n}$. Lecture Notes in Mathematics 481, Springer-Verlag, Berlin-Heidelberg-New York 1975. MR 0457661

[2] Kufner A.: Weighted Sobolev spaces. John Wiley & Sons, Chichester-New York- Brisbane-Toronto-Singapore 1985. MR 0802206 | Zbl 0579.35021

[3] Kufner A., John O., Fučík S.: Function spaces. Academia Praha 1977. MR 0482102

[4] Kufner A., Opic В.: How to define reasonably weighted Sobolev spaces. Comment. Math. Univ. Carolinae, 25 (3) (1984), 537. MR 0775568 | Zbl 0557.46025

[5] Lizorkin P. I., Otelbaev M.: Imbedding and compactness theorems for Sobolev type spaces with weights I, II. (Russian), Mat. Sb. (N.S.) 108 (150), (1979), No 3, 358-377, MR 80j : : 46054; 1J2 (154) (1980), No 1 (5), 56-85, MR 82i : 46051. MR 0530316

[6] Opic В.: Necessary and sufficient conditions for compactness of imbeddings in weighted Sobolev spaces. Časopis Pěst. Mat. (to appear).

[7] Opic В., Gurka P.: $A\sb r$-condition for two weight functions and compact imbeddings of weighted Sobolev spaces. Czechoslovak Math. J. 38(133) (1988), 611-617. MR 0962905 | Zbl 0676.46029

[8] Zajaczkowski W.: On theorem of embedding for weighed Sobolev spaces. Bulletin of the Polish Academy of Sciences Mathematics, 32 (1985), No 3 - 4, 115-121. MR 0805024