Sabdenov, K.O., and G.K. Konysbekova. “PHYSICAL PROPERTIES OF A FREE-PISTON STIRLING ENGINE WITH A REVERSIBLE CHEMICAL REACTION OF DIOXSIDE NITROGEN  TETRAOXSIDE NITROGEN IN THE WORKING GAS”. Eurasian Physical Technical Journal 23, no. 1 (55) (March 31, 2026): 34–47. Accessed April 1, 2026. https://phtj.buketov.edu.kz/EPTJ/article/view/1405.