Amor, R., Rara, B.A., Paraan, F.N.C. and Esguerra, J.P.H. 2005. Equilibrium statistical mechanics of charged disks in external electric and gravitational fields. Proceedings of the Samahang Pisika ng Pilipinas, 23(1), SPP-2005-PA-02. URL: https://proceedings.spp-online.org/article/view/SPP-2005-PA-02.