Jin, Xiaoran. “Infinite Order Differential Equations in the Space of Entire Functions of Minimal Type With Respect to a Proximate Order”. North-Western European Journal of Mathematics, no. 7 (April 23, 2021): 49–65. Accessed October 18, 2024. https://nwejm.univ-lille.fr/index.php/nwejm/article/view/21.