1  1981-09-03.32  Lagerkvist et al. (1987) 
 2  1981-09-04.31  Lagerkvist et al. (1987) 
 3  1981-09-05.32  Lagerkvist et al. (1987) 
 4  1981-09-06.35  Lagerkvist et al. (1987) 
 5  1981-09-07.26  Lagerkvist et al. (1987) 
 6  1981-10-23.30  Harris et al. (1992) 
 7  1981-10-24.12  Harris et al. (1992) 
 8  1981-12-02.23  Harris et al. (1992) 
 9  1981-12-03.19  Harris et al. (1992) 
10  1984-03-01.26  di Martino (1986) 
11  1984-03-04.27  di Martino (1986) 
12  1984-03-05.24  
13  1994-11-01.13  
14  1994-11-13.85  Kryszczyǹska et al. (1996) 
15  2002-02-28.93  
16  2002-03-10.87  
17  2002-04-01.85  
18  2002-04-02.88  
19  2002-04-05.82  
20  2002-04-08.80  
21  2006-09-15.92  
22  2006-09-20.97  
23  2006-10-09.83  
24  2007-10-07.97  
25  2007-10-13.99  
26  2007-10-15.10  
27  2007-12-08.35  
28  2007-12-11.26  
29  2007-12-12.33  
30  2008-01-03.77  
31  2008-01-11.96  
32  2008-01-13.83  
33  2009-04-15.88  
34  2009-04-24.87  
35  2009-04-28.87  
36  2009-05-13.88  
37  2010-04-25.00  
38  2010-04-26.85