References

 
• Aringer, B., Höfner, S., Wiedemann, G., et al. 1999, A&A, 342, 799 NASA ADS  
• Beichman, C. A., et al. 1985, IRAS Explanatory Supplement, NASA RP-1190  
• Bessell, M. S., Scholz, M., & Wood, P. R. 1996, A&A, 307, 481 NASA ADS  
• Bieging, J. H., & Latter, W. B. 1994, ApJ, 422, 765 NASA ADS  
• Duari, D., Cherchneff, I., & Willacy, K. 1999, A&A, 341, L47 NASA ADS  
• Farrenq, R., Guelachvili, G., Sauval, A. J., Grevesse, N., & Farmer, C. B. 1991, J. Mol. Spec., 149, 375  
• Feast, M. W., & Whitelock, P. A. 2000, MNRAS, 317, 460 NASA ADS  
• Fleischer, A. J., Gauger, A., & Sedlmayr, E. 1992, A&A, 266, 321 NASA ADS  
• Frogel, J. A. 1971, Ph.D. Dissertation, California Institute of Technology (Ann Arbor: University Microfilms)  
• Gezari, D. Y., Pitts, P. S., & Schmitz, M. 1999, Catalog of Infrared Observations, Edition 5 (NASA Goddard Space Flight Center, available at http://adc.gsfc.nasa.gov/adc-cgi/cat.pl?/catalogs/2/2225/)  
• Helling, Ch., Winters, J. M., & Sedlmayr, E. 2000, A&A, 358, 651 NASA ADS  
• Hinkle, K. H., Hall, D. N. B., & Ridgway, S. T. 1982, ApJ, 252, 697 NASA ADS  
• Hinkle, K. H., Scharlach, W. W. G., & Hall, D. N. B. 1984, ApJS, 56, R1  
• Hinkle, K., Wallace, L., & Livingston, W. 1995, Infrared Atlas of the Arcturus Spectrum, 0.9-5.3 microns (Provo: Astron. Soc. of the Pacific)  
• Höfner, S. 1999, A&A, 346, L9 NASA ADS  
• Höfner, S., Jørgensen, U. G., Loidl, R., & Aringer, B. 1998, A&A, 340, 497 NASA ADS  
• Hofmann, K.-H., Scholz, M., & Wood, P. R. 1998, A&A, 339, 846 NASA ADS  
• Hron, J., Loidl, R., Höfner, S., et al. 1998, A&A, 335, L69 NASA ADS  
• Jørgensen, U. G., Hron, J., & Loidl, R. 2000, A&A, 356, 253 NASA ADS  
• Josselin, E., Blommaert, J., Groenewegen, M., Omont, A., & Li, F. 2000, A&A, 357, 225 NASA ADS  
• Kholopov, P. N. 1985, General Catalogue of Variable Stars (Moscow: Nauka Publ. House) (GCVS)  
• Kleinmann, S. G., & Hall, D. N. B. 1986, ApJS, 62, 501 NASA ADS  
• Kwok, S. 1993, ARA&A, 31, 63 NASA ADS  
• Le Bertre, T. 1997, A&A, 324, 1059 NASA ADS  
• Le Bertre, T., & Winters, J. M. 1998, A&A, 334, 173 NASA ADS  
• Loidl, R., Höfner, S., Jørgensen, U. G., & Aringer, B. 1999, A&A, 342, 531 NASA ADS  
• Loup, C., Forveille, T., Omont, A., & Paul, J. F. 1993, A&AS, 99, 291 NASA ADS  
• Neri, R., Kahane, C., Lucas, R., Bujarrabal, V., & Loup, C. 1998, A&AS, 130, 1 NASA ADS  
• Neugebauer, G., & Leighton, R. B. 1969, Two Micron Sky Survey (NASA SP-3047)  
• Oudmaijer, R. D., Waters, L., van der Veen, W., & Geballe, T. 1995, A&A, 299, 69 NASA ADS  
• Scholz, M., & Wood, P. R. 2000, A&A, 362, 1065 NASA ADS  
• Wallace, L., & Hinkle, K. 1997, ApJS, 111, 445 NASA ADS  
• Whitelock, P., Menzies, J., Feast, M., et al. 1994, MNRAS, 267, 711 NASA ADS  
• Willacy, K., & Cherchneff, I. 1998, A&A, 330, 676 NASA ADS  
• Williams, D. M., Thompson, C. L., Rieke, G. H., & Montgomery, E. F. 1993, Proc. SPIE, 1946, 482 NASA ADS  
• Winters, J. M., Fleischer, A. J., Le Bertre, T., & Sedlmayr, E. 1997, A&A, 326, 305 NASA ADS  
• Winters, J. M., Keady, J. J., Gauger, A., & Sada, P. V. 2000, A&A, 359, 651 NASA ADS