1. Correlations between clinical mastitis at different stages of lactation in Norwegian Cattle using a multivariate threshold model;Chang;J. Dairy Sci.,2001
2. Chang, Y. M., 2002. Multivariate and longitudinal models for binary data with applications to clinical mastitis in Norwegian cattle. Ph.D. diss., Univ. Wisconsin, Madison.
3. Correlations between clinical mastitis in different periods of first lactation Norwegian Cattle using a multivariate threshold model;Chang,2002
4. Theory and analysis of threshold characters;Gianola;J. Anim. Sci.,1982
5. A mixed effects threshold model with t-distributions;Gianola,1996