Hajós Factorizations of Cyclic Groups - A Simpler Proof of a Characterization.

Clelia de Felice Hajós Factorizations of Cyclic Groups - A Simpler Proof of a Characterization. 111-116 1999 4 Journal of Automata, Languages and Combinatorics 2 db/journals/jalc/jalc4.html#Felice99