@article{VM_2013_15_1_a3,
     author = {Alexey Stakhov},
     title = {On the general theory of hyperbolic functions based on the hyperbolic {Fibonacci} and {Lucas} functions and on {Hilbert's} {Fourth} {Problem}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2013_15_1_a3/}
}