@article{e38ec0655df04cb48726591b1771f461,
title = "Higher approximate solutions of te duffing equation (Primary resonance in the soft spring system)",
author = "Hideyuki Tamura and Takahiro Kondou and Atsuo Sueoka and Noboru Ueda",
year = "1986",
doi = "10.1299/kikaic.52.40",
language = "English",
volume = "52",
pages = "40--47",
journal = "transactions of the japan society of mechanical engineers series c",
issn = "0387-5024",
publisher = "The Japan Society of Mechanical Engineers",
number = "473",
}