Feynman, R.P. (1955), "Application of Quantum Mechanics to Liquid Helium", in WP Halperin (ed.), Progress in Low Temperature Physics, vol. 1, Elsevier, pp. 17–53, doi:10.1016/s0079-6417(08)60077-3, ISBN978-0-444-53307-4{{citation}}: ISBN / Date incompatibility (help)