rMATS calculate intron retention

Question

[yuxinghai]

hello, I'm a fresh man in bioinformatics. I use rMATS to get the intron retention events, But I don't know what's the detail pepline rMATS done it. In the paper, it only talk the exon inclusion and exon skiping. Another question, I find IRcall seems can help me get IR events, but I can't find it in original site. anyone can help me ? thanks!