Fudolig, .M.I.D. and Esguerra, J.P.H. 2007. A model of code-switching and borrowing in bilingual communities. Proceedings of the Samahang Pisika ng Pilipinas, 25(1), SPP-2007-3B-01. URL: https://proceedings.spp-online.org/article/view/SPP-2007-3B-01.