1. A survey of binary systems;Bruck,1958
2. Loops related to geometric structures;Karzel;Quasigroups Related Systems,2007
3. S. Pasotti, E. Zizioli, Loops, regular permutation sets and colourings of directed graphs, In preparation.
4. S. Pasotti, E. Zizioli, Slid product of loops: a generalization, submitted for publication.
5. Loops with two-sided inverses constructed by a class of regular permutation sets;Pasotti;J. Geom.,2011