Double deeply virtual Compton scattering with positron beams at SoLID S. Zhao, A. Camsonne, D. Marchand, M. Mazouz, N. Sparveris, S. Stepanyan, E. Voutier and Z. W. Zhao Eur. Phys. J. A, 57 7 (2021) 240 Published online: 19 July 2021 DOI: 10.1140/epja/s10050-021-00551-3