“…An experimentalist could face an extra Kosterlitz-Thouless phase transition, liquefaction of ( 3 He) 2 or polymerization of 3 He, crossover from a Bose gas of dimers to a 2D Fermi fluid (with strong pair correlation) upon increasing the 3 He concentration, etc. [8,9,33,34,35,36]. The dimer binding energy is a cornerstone characteristic of all these phenomena which are exciting objectives for experimental and theoretical studies.…”