William E. Howden. The sofa problem. Comput. J., 11(3):299-301, 1968. [doi]
@article{Howden68,
title = {The sofa problem},
author = {William E. Howden},
year = {1968},
doi = {10.1093/comjnl/11.3.299},
url = {https://doi.org/10.1093/comjnl/11.3.299},
researchr = {https://researchr.org/publication/Howden68},
cites = {0},
citedby = {0},
journal = {Comput. J.},
volume = {11},
number = {3},
pages = {299-301},
}