Ordonio, A.E.M. and Villagonzalo, C.D. 2023. Entropy and specific heat features of a four spin system at its energy level crossings. Proceedings of the Samahang Pisika ng Pilipinas, 41(1), SPP-2023-PA-33. URL: https://proceedings.spp-online.org/article/view/SPP-2023-PA-33.