# What is the definition of brick product? Graph theory

Can anyone help me with the exact definition of brick product of graphs, say path, cycle.

I am not able to find a paper with a clear definition on the internet. Can anyone give me a URL to such a paper?

• It might help if you would tell us where you have found the term used. – Gerry Myerson Oct 11 at 11:15

• There seems something strange about this definition - when $m>1$, I can't see where $r$ is used? – Gordon Royle Oct 12 at 4:17