Scalar quanta in Fermi liquids: Zero sounds, instabilities, Bose condensation, and a metastable state in dilute nuclear matterE. E. Kolomeitsev and D. N. VoskresenskyEur. Phys. J. A, 52 12 (2016) 362DOI: https://doi.org/10.1140/epja/i2016-16362-0