Kaprekar's transformations. Part I - theoretical discussion. - Edyta Hetmaniok; Mariusz Pleszczynski; Ireneusz Sobstyl; Roman Witula (FedCSIS, 2015)

Kaprekar's transformations. Part II-numerical results and intriguing corollaries. - Edyta Hetmaniok; Mariusz Pleszczynski; Ireneusz Sobstyl; Roman Witula (FedCSIS (Position Papers), 2015)