GrailQuest: hunting for atoms of space and time hidden in the wrinkle of Space-Time: A swarm of nano/micro/small-satellites to probe the ultimate structure of Space-Time and to provide an all-sky monitor to study high-energy astrophysics phenomena. - Burderi, L.; Sanna, A.; Di Salvo, T.; Amati, L.; Amelino-Camelia, G.; Branchesi, M.; Capozziello, S.; Coccia, E.; Colpi, M.; Costa, E.; D'Amico, N.; De Bernardis, P.; et al. (Experimental Astronomy, 2021)