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The $l$-loop Banana Amplitude from GKZ Systems and relative Calabi-Yau Periods. (arXiv:1912.06201v1 [hep-th]) http://arxiv.org/abs/1912.06201
The $l$-loop Banana Amplitude from GKZ Systems and relative Calabi-Yau Periods. (arXiv:1912.06201v1 [hep-th]) http://arxiv.org/abs/1912.06201