Attalienti, Antonio, and Ioan Raşa. “The Eigenstructure of Some Positive Linear Operators”. Rev. Anal. Numér. Théor. Approx. 43, no. 1 (February 1, 2014): 45–58. Accessed November 23, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2014-vol43-no1-art3.