The RecursiveTools FastJet contrib is developed and maintained by: Gavin P. Salam Gregory Soyez Jesse Thaler Kevin Zhou Frederic Dreyer The physics is based on: [ModifiedMassDropTagger] Towards an understanding of jet substructure. Mrinal Dasgupta, Alessandro Fregoso, Simone Marzani, and Gavin P. Salam. JHEP 1309:029 (2013), arXiv:1307.0007. [SoftDrop] Soft Drop. Andrew J. Larkoski, Simone Marzani, Gregory Soyez, and Jesse Thaler. JHEP 1405:146 (2014), arXiv:1402.2657 [IteratedSoftDrop] Casimir Meets Poisson: Improved Quark/Gluon Discrimination with Counting Observables. Christopher Frye, Andrew J. Larkoski, Jesse Thaler, Kevin Zhou. JHEP 1709:083 (2017), arXiv:1704.06266 [RecursiveSoftDrop] [BottomUpSoftDrop] Recursive Soft Drop. Frederic A. Dreyer, Lina Necib, Gregory Soyez, and Jesse Thaler JHEP 1806:093 (2018), arXiv:1804.03657