@article{EkhadKoutschanZeilberger21,
 author = {Shalosh B.~Ekhad and Christoph Koutschan and Doron Zeilberger},
 title = {There are {EXACTLY} 1493804444499093354916284290188948031229880469556 Ways to Derange a Standard Deck of Cards (ignoring suits) [and many other such useful facts]},
 journal = {Enumerative Combinatorics and Applications},
 isbn_issn = {ISSN 2710-2335},
 year = {2021},
 volume = {1},
 number = {3},
 pages = {{\#}S2R17},
 url = {https://sites.math.rutgers.edu/~zeilberg/mamarim/mamarimhtml/multider.html},
}