title: Comment on "period doubling of a torus near the ferroelectric phase transition of a KH2PO4 crystal".
authors.affiliation: Physics Department, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea.
authors.forename: J H
authors.initials: JH
authors.lastname: Yeo
authors.forename: J J
authors.initials: JJ
authors.lastname: Kim