1. Some integral inequalities and the solvability of degenerate quasilinear elliptic systems of differential equations;Dubinskii;Mat. Sb.,1964
2. Normal and integral currents;Federer;Ann. Math.,1960
3. Functions whose partial derivatives are measures;Fleming;Illinois J. Math.,1960
4. An integral formula for total gradient variation;Fleming;Arch. Math.,1960
5. Partial Differential Equations of Parabolic Type;Friedman,1964