@article{WatanabeTakeshi:1987-00-00,
author="Watanabe,  Takeshi",
title="Nonlinear Vibration Analysis and Its Applications in Mechanical Systems 2nd Report : New Research Directions for Vibration Problems in Strongly Nonlinear Mechanical Systems",
journal="Memoirs of the Faculty of Liberal Arts & Education. Part II, Mathematics & natural sciences",
ISSN="03858766",
publisher="University of Yamanashi",
year="1987",
month="",
volume="38",
number="",
pages="61-66",
URL="http://ci.nii.ac.jp/naid/110000359304/en/",
DOI="",
}