Resources:
Louvain: Fast and Memory efficient. A Parallel Alternative
https://phys.org/news/2015-01-fast-problems.html
Modularity_(networks)
https://en.wikipedia.org/wiki/Modularity_(networks)
Louvain Modularity
https://en.wikipedia.org/wiki/Louvain_Modularity
Fast unfolding of communities in large networks
https://arxiv.org/pdf/0803.0476.pdf
Resolution Limit
https://en.wikipedia.org/wiki/Modularity_%28networks%29#Resolution_limit