Cristescu, Gabriela. “Cones in a Convexity Space; Ordered Convexity Spaces”. Anal. Numér. Théor. Approx. 9, no. 2 (August 1, 1980): 157–162. Accessed May 13, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1980-vol9-no2-art1.