@article{ZNSL_2000_267_a6,
     author = {V. I. Zvonilov},
     title = {Rigid isotopies of real trigonal curves on the {Hirzebruch} surfaces},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {133--142},
     publisher = {mathdoc},
     volume = {267},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_267_a6/}
}