Topdrim partners Hillary S.W. Han and Christian M. Reidys submitted two papers contributing to the project. In A bijection for tri-cellular maps, the authors give a bijective proof for a relation between uni- bi- tricellular maps and certain topological genus. In A bijection between unicellular and bicellular maps the authors present a combinatorial proof of a relation between the generation function of unicellular and bicellular maps.

Both paper can be downloaded from the Publications section.