Andean Tribunal of Justice
Karen Alter and Larry Helfer have published the first two articles in a series of papers on the ATJ, which includes the results of their coding of over 1400 ATJ preliminary reference rulings. Links to the pre-publication drafts of the articles on SSRN are below.
Karen Alter also has a single-authored paper using this data:
Center on Law and Globalization Research Paper No. 08-05
Some of the judgments are available here but this is very much an incomplete set.