1           1979-07-15.31  Harris & Young (1983) 
 2           1979-07-16.28  Harris & Young (1983) 
 3           1979-07-31.28  Harris & Young (1983) 
 4           1979-08-01.23  Harris & Young (1983) 
 5           1979-08-03.28  Harris & Young (1983) 
 6           1984-10-20.99  Lagerkvist et al. (1995) 
 7           1984-10-23.02  Lagerkvist et al. (1995) 
 8           1984-10-26.95  Lagerkvist et al. (1995) 
 9           1995-03-05.11  Piironen et al. (1998) 
10           1995-03-07.15  Piironen et al. (1998) 
11           1995-03-09.10  Piironen et al. (1998) 
12           1995-03-11.10  Piironen et al. (1998) 
13           1995-03-26.10  Piironen et al. (1998) 
14  1998-11-04--2012-02-01  Lowell