Deakin, Michael A. B. The ellipsing pendulum. (English) Zbl 1293.97072 Int. J. Math. Educ. Sci. Technol. 44, No. 5, 745-752 (2013). MSC: 97M50 70E17 PDFBibTeX XMLCite \textit{M. A. B. Deakin}, Int. J. Math. Educ. Sci. Technol. 44, No. 5, 745--752 (2013; Zbl 1293.97072) Full Text: DOI
Fay, Temple H. A quadratic spring equation. (English) Zbl 1292.97057 Int. J. Math. Educ. Sci. Technol. 41, No. 1, 79-91 (2010). MSC: 97M50 97N40 97I70 70E17 34D20 PDFBibTeX XMLCite \textit{T. H. Fay}, Int. J. Math. Educ. Sci. Technol. 41, No. 1, 79--91 (2010; Zbl 1292.97057) Full Text: DOI