Yu, Albert Pak Ngar Double pendulums in two degrees of freedom. (English) Zbl 0343.70009 J. Singapore Natl. Acad. Sci. 5, 70-72 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 70F99 Dynamics of a system of particles, including celestial mechanics PDF BibTeX XML Cite \textit{A. P. N. Yu}, J. Singapore Natl. Acad. Sci. 5, 70--72 (1976; Zbl 0343.70009)