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, [S. l.], v. 19, p. 151–157, 2026. DOI: 10.70267/icfmb.202619151157. Disponível em: https://journals.zeuspress.org/index.php/conference/article/view/1065. Acesso em: 14 aug. 2026.