http://www.skinbiology.com/
http://www.procyte.com/technology.html
N-furfuryladenine info:
http://www.oakwood-medical.com/kinerasehome.htm
Retin A - Micro Retin A - Renova data:
http://www.pharminfo.com/pubs/msb/tretinoin2.html
http://www.dermspec.com/Skin/retina.htm
http://www.wfla.com/health/116.htm
http://users.erols.com/gtodorov/skincare/tretin.htm
Vit C information:
http://www.cellex-c.com/
http://www.skinceuticals.com/science/index.html
http://www.healthyideas.com/healing/living/980922.lvg5.html