@article {,
	title = {Undiscovered issues and solutions for direct detected ϕ-OTDR systems},
	journal = {Optical Fiber Technology},
	volume = {60},
	year = {2020},
	month = {12/2020},
	pages = {102346},
	issn = {1068-5200},
	doi = {10.1016/j.yofte.2020.102346},
	author = {Adeel, Muhammad and Javier Tejedor and Javier Macias-Guarasa and Zhu, Kun}
}
