The RecursiveTools FastJet contrib is developed and maintained by: Gavin P. Salam Gregory Soyez Jesse Thaler 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