@article{PMFA_2009__54_3_a3,
     author = {Edmunds, David and Lang, Jan},
     title = {Zobecn\v{e}n\'e trigonometrick\'e funkce z r\r{u}zn\'ych \'uhl\r{u} pohledu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {212--224},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {2009},
     zbl = {1265.33001},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2009__54_3_a3/}
}