Generation of Permutations Based Upon Factorial Numbers. - Alexei A. Borisenko; Vyacheslav Kalashnikov; Igor A. Kulik; O. E. Goryachev (ISDA (3), 2008)

A New Approach to the Classification of Positional Numeral Systems. - Alexei A. Borisenko; Vyacheslav V. Kalashnikov; Tatiana A. Protasova; Nataliya I. Kalashnykova (IDT/IIMSS/STET, 2014)