@article{ZNSL_2010_374_a10,
     author = {M. Ilyin and P. Kulish and V. Lyakhovsky},
     title = {Folded fans and string functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {197--212},
     publisher = {mathdoc},
     volume = {374},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2010_374_a10/}
}