Kiriyatzkii, Eduard, and J. Kirjackis. “On Some Limit Properties of Functions With Nonvanishing Divided Differences”. Mathematical Modelling and Analysis 14, no. 3 (September 30, 2009): 313-321. Accessed December 22, 2024. https://jeelm.vgtu.lt/index.php/MMA/article/view/6552.