Marchenkov, S. S. (2007). „Superpositions of elementary arithmetic functions”. Journal of Applied and Industrial Mathematics. 1 (3): 351—360. S2CID122405814. doi:10.1134/S1990478907030106.
Marchenkov, S. S. (2007). „Superpositions of elementary arithmetic functions”. Journal of Applied and Industrial Mathematics. 1 (3): 351—360. S2CID122405814. doi:10.1134/S1990478907030106.