1. The ALLOC Package: multigroup discriminant analysis programs based on direct density estimation;Habbema;Compstat,1974
2. The ALLOC Package: multigroup discriminant analysis programs based on direct density estimation;Habbema,1976
3. Comparison of five methods to estimate posterior probabilities;Habbema;EDV Med. Biol.,1975
4. On estimation of a probability density function and mode;Parzen;AMS,1962
5. Estimation of a multivariate density;Cacoullos;Ann. Inst. Stat. Math.,1966