Today ggtree received 100 stars on and I found the paper was online at the same day by the tweet: I am quite exciting about it. Now ggtree is citable by doi:10.1111/2041-210X.12628. In the review period, ggtree had already been cited by several papers: 1. https://doi.org/10.7717/peerj.976 Annotating phylogenetic tree with image files (i.e. secondary structure). 2. http://dx.doi.org/10.1016/j.meegi