Виннишин, Я., Маркітан, В., Працьовитий, М. and Савченко, І. 2019. Positive series whose sets of incomplete sums are Cantorvals. Proceedings of the International Geometry Center. 12, 2 (Oct. 2019), 26–42. DOI:https://doi.org/10.15673/tmgc.v12i2.1455.