@article{ZNSL_2000_270_a10,
     author = {H. S. Mustafaev and M. T. Karaev},
     title = {Expansion of the element~$\sin a$ in exponentials for {Hermitian~}$a$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {253--257},
     year = {2000},
     volume = {270},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_270_a10/}
}