1  1989A&AS...78..399T te Lintel Hekkert, P., Versteege-Hensel, H.A., Habing,
 1  H.J., Wiertz, M.: 1989, ApJ Supp. Ser., 98, 399
 2  1991A&AS...90..327T te Lintel Hekkert, P., Caswell, J.L., Habing, H.J.,
 2  Haynes, R.F., Norris, R.P.: 1991, Apj Supp. Ser., 90, 327
 3  1989A&A...217..157Z Zijlstra, A.A., te Lintel Hekkert, P., Pottasch, S.R.,
 3  Caswell, J.L., Ratag, M., Habing, H.J.: 1989, 217, 157
 4  1989AJ.....98.2182G Galt J. A., Kwok S., Frankow J.: 1989, Astron. J., 98,
 4  6, 2182
 5  1991ApJS...75.1323D detected at 1667MHz by Dickinson, D.F., Turner, B.E.:
 5  1991, ApJ Supp. Ser., 75, 1323
 7  1993A&AS...98..245D detected at 1667MHz by David P., Le Squeren A.M.,
 7  Sivagnanam P., Braz M.A., in print
 8  1988ApJS...66..183E Eder J., Lewis B.M., Terzian Y.: 1988, ApJ Supp. Ser.,
 8  66, 183
 9  1990ApJ...362..634L Lewis B.M., Eder J., Terzian Y.: 1990, ApJ, 362, 634