Upper Bounds on the Distance Between Groups and Quasi-groups. - Markku Niemenmaa (Eur. J. Comb., 1988)

On Connected Transversals to Subgroups Whose Order is a Product of Two Primes. - Markku Niemenmaa (Eur. J. Comb., 1997)

On Connected Transversals to Nonabelian Subgroups. - Piroska Csörgö; Markku Niemenmaa (Eur. J. Comb., 2002)

A check digit system for hexadecimal numbers. - Markku Niemenmaa (Appl. Algebra Eng. Commun. Comput., 2011)

On some properties of a check digit system. - Yanling Chen 001; Markku Niemenmaa; A. J. Han Vinck; Danilo Gligoroski (ISIT, 2012)

On the Error Detection Capability of One Check Digit. - Yanling Chen 001; Markku Niemenmaa; A. J. Han Vinck; Danilo Gligoroski (IEEE Trans. Inf. Theory, 2014)

A general check digit system based on finite groups. - Yanling Chen 001; Markku Niemenmaa; A. J. Han Vinck (Des. Codes Cryptogr., 2016)