@article{  
   author = {P. Baldi, W. H. Batchelder},
   title = {Bounds on Variances of Estimators for Multinomial Processing Tree Models.},
   journal = {Journal of Mathematical Psychology},
   volume = {47},
   number = {},
   pages = {467-470},
   note = {},
   abstract = {},
   keywords = {},
   year = {2003}
}