Stanley Rabinowitz, et al.. Sometimes an Integer: 11213. The American Mathematical Monthly, 115(4):366-367, 2008. [doi]
@article{Rabinowitza08,
title = {Sometimes an Integer: 11213},
author = {Stanley Rabinowitz and et al.},
year = {2008},
url = {http://www.jstor.org/stable/27642490},
researchr = {https://researchr.org/publication/Rabinowitza08},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {115},
number = {4},
pages = {366-367},
}