Koosis, P. «A Result on Polynomials and Its Relation to Another, Concerning Entire Functions of Exponential Type». Математическая физика, анализ, геометрия, вип. 5, вип. 1-2, Травень 1998, с. 68-86, https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m05-0068e.