1. Sobolev Spaces;Adam,1983
2. Regularity of integrands f(x,ξ)=|ξ|ga(x) with piecewise constant exponents α(x);Fan;J. Gansu Sci.,1996
3. The regularity of Lagrangians f(x,ξ)=|ξ|α(x) with Hölder exponents α(x);Fan;Acta Math. Sinica (N.S.),1996
4. Regularity of nonstandard Lagrangians f(x,ξ);Fan;Nonlinear Anal.,1996
5. Regularity of Lagrangians with α(x)-growth conditions;Fan;J. Lanzhou Univ.,1997