G. Iannacchione et al., AC-CALORIMETRY STUDIES AT THE HEXATIC-B SMECTIC-A AND CRYSTAL-B HEXATIC-B PHASE-TRANSITIONS IN 2 COMPOUNDS WITH HYDROGEN-BONDING, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 51(4), 1995, pp. 3346-3349