The n-loop String Amplitude: Explicit Formulas, Finiteness and Absence of Ambiguities
1997 ◽
Vol 262
(1-3)
◽
pp. 131-163
◽
Keyword(s):
Keyword(s):
Keyword(s):
1995 ◽
Vol 09
(25)
◽
pp. 3241-3268
◽
2015 ◽
Vol 152
(3)
◽
pp. 445-476
◽
Keyword(s):
Keyword(s):