@article{ZNSL_2015_441_a18,
     author = {M. Hinz and A. Teplyaev},
     title = {Closability, regularity, and approximation by graphs for separable bilinear forms},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {299--317},
     publisher = {mathdoc},
     volume = {441},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2015_441_a18/}
}