Хлопенко, Н., and Т. Сорокина. “ Feeder Diameter and it’s Arrangement for Hybrid Reyleigh Step Bearing”.
Problems of Tribology
, vol. 79, no. 1, June 2016, pp. 76-79, https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/517.