Ragnar Pall Ardal, Arnar Bjarni Arnarson, Christian Bean, Alfur Birkir Bjarnason, Jon Steinn Eliasson, Bjarki Agust Gudmundsson, Sigurjón Ingi Jónsson, Bjarni Jens Kristinsson, Tomas Ken Magnusson, Émile Nadeau, Jay Pantone, Murray Tannock, & Henning Ulfarsson. Permuta: A Python Library for Permutations and Patterns [Computer software]