References

• Caswell J.L., Vaile R.A., Ellingsen S.P., Whiteoak J.B., Norris R.P., 1995, MNRAS 272, 96 NASA ADS
• Claussen M.J., Wilking B.A., Benson P.J., Wootten A., Myers P.C., Terebey S., 1996, ApJS 106, 111 NASA ADS
• Downes D., Genzel R., Moran J.M., et al., 1979, A&AS 79, 233
• Elitzur M., 1992, Astronomical Masers. Kluwer, Dordrecht, p. 107
• Evans N.J., Beckwith S., Brown R.L., Gilmore W., 1979, ApJ 227, 450 NASA ADS
• Garlick A.R., 1978, A&A 68, 113 NASA ADS
• Genzel R., Downes D., 1977, A&AS 30, 145 NASA ADS
• Koo B.-C., 1989, ApJ 337, 318 NASA ADS
• Kurtz S., Churchwell E., Wool D.O.S., 1994, ApJS 91, 659 NASA ADS
• Lekht E.E., 1994, AZh 71, 59
• Lekht E.E., 1995, AZh 72, 532 NASA ADS
• Margulis M., Snell R.L., 1989, ApJ 343, 779 NASA ADS
• Mattila K., Holsti N., Toriseva M., et al., 1985, A&A 145, 192 NASA ADS
• Matthews H.E., Shaver P.A., Goss W.M., Habing H.J., 1978, A&A 63, 307 NASA ADS
• Menten K.M., 1991, ApJ 380, L75 NASA ADS
• Plume R., Jaffe D.T., Evans II N.J., 1992, ApJS 78, 505 NASA ADS
• Shepherd D.S., Churchwell E., 1996, ApJ 457, 267 NASA ADS
• Strel'nitskij V.S., 1982, Pis'ma v AZh 8, 165 NASA ADS
• Tutukov A.V., Shustov B.M., 1978, Nauch. Inform. Astron. Soveta AN SSSR 41, 125
• Yorke H.W., Krügel E., 1977, A&A 54, 183 NASA ADS