Milonni P. Free Energy of Coupled Oscillators: Lamb Shifts and van der Waals Interactions. Acta Phys. Pol. A [Internet]. 2023 Jun. 14 [cited 2024 Oct. 22];143(6):S78. Available from: https://appol.ifpan.edu.pl/index.php/appa/article/view/143_78