[igraph] reference

[Szalay-Bekő Máté]

Hi,

we are about to publish a bioinformatic paper and in the supplementary
materials there are some table contains basic network attributes
calculated by the python-igraph module.
Do you have some preferred paper you wish us to use in the references?
Or should we just put a link to the project homepage? (On your page I
did not found any info regarding this issue...)

Thanks and BR,
Mate