References

• Bappu M.V.K., Sivaraman K.R., Bhatnagar A., Natrajan V., 1967, MNRAS 136, 19
• Blackwell D.E., Willstrop R.V., 1957, MNRAS 117, 590 NASA ADS
• Deshpande M.R., Joshi U.C., Kulshrestha A.K., Bansidhar, et al., 1985, Bull. Astron. Soc. India 13, 157 NASA ADS
• Dollfus A., Bastien P., Le Borgne J.F., Levasseur-Regourd A.C., Mukai T., 1988, A&A 206, 348 NASA ADS
• Dollfus A., 1989, A&A 213, 469 NASA ADS
• Giese R.H., Weiss K., Zerull R.H., Ono T., 1978, A&A 65, 265 NASA ADS
• Greenberg J.M., Gustafson B.A.S., 1981, A&A 93, 35 NASA ADS
• Joshi U.C., Deshpande M.R., Sen A.K., Kulshrestha A.K., 1987, A&A 181, 31 NASA ADS
• Joshi U.C., et al., 1997, A&A 319, 694 NASA ADS
• Kikuchi S., Mikami Y., Mukai T., Mukai S., Hough T., 1987, A&A 187, 689 NASA ADS
• Levasseur-Regourd A.-C., et al., 1996, A&A 313, 327 NASA ADS
• Ohman Y., 1941, Stockholm Obs. Ann. 13, 11
• Renard J.B., Hadamcik H., Levasseur-Regourd A.-C., 1996, A&A 316, 263 NASA ADS
• Schleicher D., 1996 (private communication)
• Sen A.K., Joshi U.C., Deshpande M.R., 1991a, MNRAS 253, 738 NASA ADS
• Sen A.K., Deshpande M.R., Joshi U.C., Rao N.K., Raveendran A.V., 1991b, A&A 242, 496 NASA ADS
• Serkowski K., 1974, in Planets, stars and nebulae studied through photopolarimetry, Gehrels T. (ed.). Univ. of Arizona Press