@article{JIS_2009__12_8_a3,
     author = {Bibak,  Kh. and Shirdareh Haghighi,  M.H.},
     title = {Some trigonometric identities involving {Fibonacci} and {Lucas} numbers},
     journal = {Journal of integer sequences},
     year = {2009},
     volume = {12},
     number = {8},
     zbl = {1201.11023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2009__12_8_a3/}
}