1. SPD web site http://spd.jinr.ru
2. The SPD collaboration. Conceptual design of the Spin Physics Detector. version1.1.arXiv:2102.00442v3 [hep-ex] 2 Feb 2022.
3. V.V. abramov et al. Possible Studies at the First Stage of the NICA Collider Operation with Polarized and Unpolarized Proton and Deuteron Beams. SPD Collab. Phys. Part. Nucl. 52, 1044 (2021).
4. E.C. Aschenauer (Brookhaven Natl. Lab.), M. Diefenthaler (Jefferson Lab). ICFA Beam Dyn. Newslett. 74, 10-23 (2018).
5. E. Kokoulina et al. Study of soft photon yield in pp and AA interactions at JINR. EPJ Web Conf. 235, 03003(2020).