The main reference for the CMOS IP3 is not correct in the refered website document.
Here is link to the author's presentation (Thomas Lee's Standford group)
http://www-smirc.stanford.edu/papers/cancun97s-chet.pdfAnd here is the paper
http://www-smirc.stanford.edu/papers/cancun97p-chet.pdfAlso note that the web paper on LNA's is about differential LNAs, but the IP3 paper is on short channel single ended MOSFETs.
There was also a good characterization paper at RFIC 2005 on linearity of short channel MOSFETs.
Guofu Niu; Jun Pan; Xiaoyun Wei; Taylor, S.S.; Sheridan, D., "Intermodulation linearity characteristics of CMOS transistors in a 0.13 /spl mu/m process," Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE , vol., no.pp. 65- 68, 12-14 June 2005