Lin, Shiyu. “Valuation of Pre-Profit Technology Companies Based on the Price-to-Sales Ratio and Black-Scholes Model: A Case Study of Beijing Phylisense Technology Co., Ltd”. Exploring Science Academic Conference Series 19 (July 29, 2026): 151–157. Accessed August 14, 2026. https://journals.zeuspress.org/index.php/conference/article/view/1065.