@article {MR2480936,
	title = {Linear orders with distinguished function symbol},
	journal = {Arch. Math. Logic},
	volume = {48},
	number = {1},
	year = {2009},
	pages = {63{\textendash}76},
	issn = {0933-5846},
	doi = {10.1007/s00153-008-0112-4},
	url = {https://doi.org/10.1007/s00153-008-0112-4},
	author = {Cenzer, Douglas and Csima, Barbara F. and Khoussainov, Bakhadyr}
}
