Effect of bromine deficiency on large elastic moduli of alpha-phase diisopropyl ammonium bromide (α-DIPAB) molecular crystalsAhmad Alsaad, Nabil Alaqtash, Ali Al Kadhim, Renat F. Sabirianov, Ahmad Ahmad, Issam A. Qattan and Mohammad-Ali H. Al-AkhrasEur. Phys. J. B, 93 1 (2020) 5DOI: https://doi.org/10.1140/epjb/e2019-100258-y