@article{ZNSL_2020_498_a9,
     author = {M. Ozawa},
     title = {Multibranched surfaces in $3$-manifolds},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {135--156},
     publisher = {mathdoc},
     volume = {498},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2020_498_a9/}
}