The European Physical Journal D
The European Physical Journal D > 1998 > 1 > 3 > 297-302
The European Physical Journal D > 1999 > 9 > 1-4 > 543-546
The European Physical Journal D > 1998 > 1 > 3 > 297-302
The European Physical Journal D > 1999 > 9 > 1-4 > 543-546