Squeezing interval change from ordinal panel data: latent growth curves with ordinal outcomes
Psychological Methods (2004) - Comment
pubmed: 15355151  doi: 10.1037/1082-989x.9.3.301  issn: 1082-989x  issn: 1939-1463 

Paras D. Mehta, Michael C. Neale, Brian R. Flay