Andrica, Dorin, and Nicolae Muşuroia. “Cones of Holomorphic Functions With Positive Real Part”.
Anal. Numér. Théor. Approx. 10, no. 2 (August 1, 1981): 133–139. Accessed April 11, 2025.
https://ictp.acad.ro/jnaat/journal/article/view/1981-vol10-no2-art1.