Low-energy spectrum of the BULLKID detector array operated on surface D. Delicato, A. Ahmad, L. Bandiera, M. Calvo, M. Cappelli, G. Del Castello, M. del Gallo Roccagiovine, M. Giammei, V. Guidi, D. Maiello et al. (7 more) Eur. Phys. J. C, 84 4 (2024) 353 Published online: 03 April 2024 DOI: 10.1140/epjc/s10052-024-12714-9