1. Apogee Instruments Inc 2003, Alta Cameras Announcement (available at http://www.ccd.com/alta.html)
2. Radii and Effective Temperatures for K and M Giants and Supergiants. II.
3. Dunham, D., & Warren, W. H. Jr. 1995 (available at ADC/CDS http://cdsweb.u-strasbg.fr/viz-bin/VizieR-2?-source=I/201)
4. Dunham, D., & Herald, D. 2004, private communication