1. Adler, R. J. 1981, The Geometry of Random Fields (Chichester: Wiley)
2. Buchert, T. 1995, in 11th Potsdam Workshop on Large-Scale Structure in the Universe, ed. J. Mucket, S. Gottlober, & V. Muller (Singapore: World Scientific), 156
3. Quantifying the topology of large-scale structure
4. Topology of COBE microwave background fluctuations