@article{10_21136_MB_2015_144328,
     author = {Girg, Petr and Kotrla, Luk\'a\v{s}},
     title = {Generalized trigonometric functions in complex domain},
     journal = {Mathematica Bohemica},
     pages = {223--239},
     publisher = {mathdoc},
     volume = {140},
     number = {2},
     year = {2015},
     doi = {10.21136/MB.2015.144328},
     mrnumber = {3368496},
     zbl = {06486936},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2015.144328/}
}