[1] Alt H. W.: 
Lineare Funktionalanalysis. Springer-Verlag, Berlin-Heidelberg-New York-Tokyo, 1985. 
Zbl 0577.46001[2] Deimling K.: 
Nonlinear Functional Analysis. Springer-Verlag, Berlin-Heidelberg-New York-Tokyo, 1985. 
MR 0787404 | 
Zbl 0559.47040[3] Drábek P., Kufner A.: 
The Hardy inequality and Birkhoff interpolation. To appear in Bayreuth. Math. Schriften. 
MR 1285205[4] Drábek P., Kufner A., Nicolosi F.: 
On the solvability of degenerated quasilinear elliptic equations of higher order. To appear in Journal Differential Equations. 
MR 1273306[5] Kufner A.: 
Higher order Hardy inequalities. Bayreuth. Math. Schriften 44 (1993), 105-146. 
MR 1224775 | 
Zbl 0802.26006[6] Kufner A., Heinig H. P.: 
Hardy's inequality for higher order derivatives. (Russian), Trudy Mat. Inst. Steklov 192 (1990), 105-113, (English translation: Proc. of the Steklov Inst. of Math. 1992, Issue 3, 113-121). 
MR 1097892[7] Opic B., Kufneг A.: 
How to define reasonably weighted Sobolev spaces. Comment. Math. Univ. Carolinae 25 (1984), 537-554. 
MR 0775568[8] Opic B., Kufner A.: 
Hardy-type inequalities. Pitman Research Notes in Math. Series 219. Longman, Harlow, 1990. 
MR 1069756 | 
Zbl 0698.26007[9] Stepanov V. D.: 
Two-weighted estimates of Riemann-Liouville integrals. (Russian), Izv. Akad. Nauk SSSR Ser. Mat.54 3 (1990), 645-656, (English translation: Math. USSR Izvestiya 36 (1991), No. 3, 669-681). 
MR 1072699 | 
Zbl 0705.26015