[
[Ben96] Benjamin, Art. “Combinatorics and campus security.” Journal for Undergraduate Mathematics and its Applications, 17(2), 1996: 111–116. to the list of references.
]Search in Google Scholar
[
[Cuo05] Al Cuoco. Mathematical Connections, A Companion for Teachers and Others. MAA, 2005, 173–184.10.1090/clrm/027
]Search in Google Scholar
[
[McK16] Christopher M. McKay. “On the n-Button Lock Problem and Combinatorial Proofs to Fibonacci Identities.” Bachelor’s Thesis in Mathematics, Stonehill College, 2016.
]Search in Google Scholar
[
[Vel95] Daniel J. Velleman and Gregory S. Call. “Permutations and Combination Locks.” Mathematics Magazine 68:4, 1995: 243–253.10.1080/0025570X.1995.11996328
]Search in Google Scholar
