1. B. T. Rushing, Topological Embeddings, Academic Press, New York (1973).
2. L. C. Evans and R. F. Gariepy, Measure Theory and Fine Properties of Functions, CRC Press, Boca Raton (1992).
3. H. Federer, Geometric Measure Theory, Springer, Berlin (1969).
4. S. Saks, Theory of the Integral, Dover, New York (1964).
5. T. Rado and P. V. Reichelderfer, Continuous Transformations in Analysis, Springer, Berlin (1955).