Bibliographical references

Coifmann, R.R. and G. Weiss, Analyse Harmonique Non-commutative sur Certains Espaces Homogènes, Lectures Notes in Math. vol. 242 (1971), Springer-Verlag.

Federer, H., Geometric Measure Theory (1969), Springer Verlag.

Eckmann, J.P., E. Järvenpää and M. Järvenpää, Porosities and Dimensions of Measures, Nonlinearity 13 (2000), 1-18.

Guzmán, M. de, Differentiation of Integrals in IRn, Lectures Notes in Math. Vol. 481 (1975), Springer-Verlag.

Mattila, P., Geometry of sets and measures in Euclidean spaces (1995), Cambridge University Press.

Preiss, D., Geometry of mensures in IRn, Ann. of Math.,(2) 125 (1987), 537-643.

Salli, A., On the Minkowski dimension of strongly porous fractal sets in IRn, Proc. London Math. Soc, (3) 62 (1991), 353-372.

Thomson, B.S., Real Functions, Lectures Notes in Math, vol. 1170 (1985), Springer-Verlag.

Zajicek, L., Porosity and o-porosity, Real Analysis Exchange, 13 (1987-88), 314-350.