You are a touchy one, aren't you?
Again, SAE papers or anything that can be freely published. If you've been doing this for 15-18 years, surely you know of some open source general references?
Even if a super secret slot design gives a competitive advantage, what kind of advantage is it if the company never tells the consumer about it? It is surprising to me that no one anywhere has ever done tests to say, "Yes, our slotted rotors outperformed the basic OEM plain rotors by XX%." Maybe no one has a marketing department...... Heck, no mechanical engineer students have undertaken this as a test for a thesis?