@article{GDZPPN002062860,
title = {Level sets of infinite length.},
journal = {Commentarii mathematici Helvetici},
volume = {53},
year = {1978},
pages = {161-164},
zbl = {0374.30025},
url = {http://dml.mathdoc.fr/item/GDZPPN002062860}
}
Piranian, George; Weitsman, Allen. Level sets of infinite length.. Commentarii mathematici Helvetici, Tome 53 (1978) pp. 161-164. http://gdmltest.u-ga.fr/item/GDZPPN002062860/