@article{MZ_1970__113_171274,
     author = {Shao-Chien Chang},
     title = {Conull {FK} {Spaces} {Belonging} to the {Class} 0.},
     journal = {Mathematische Zeitschrift},
     pages = {249--254},
     publisher = {mathdoc},
     volume = {113},
     year = {1970},
     zbl = {0176.43002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__113_171274/}
}