The location linear discriminant for classifying observations with unequal variances

The Covariance Adjusted Location Linear Discriminant Function for Classifying Data with Unequal Dispersion Matrices in Different Locations

Leung, Chi-Ying, (1998)

Covariance Adjustments in Discrimination of Mixed Discrete and Continuous Variables

Leung, Chi-Ying, (1999)

Regularized classification for mixed continuous and categorical variables under across-location heteroscedasticity

Leung, Chi-Ying, (2005)