@article{doi:,
author = {Forta, Hulki},
title = {Cluster headache},
journal = {Med Bull Sisli Etfal Hosp},
volume = {36},
number = {1},
pages = {7-12},
year = {2002},
doi = {},
note ={doi: },

URL = {https://dx.doi.org/},
eprint = {https://dx.doi.org/}
}