@conference {tsitouras2014solving,
	title = {Solving undamped unforced free oscillators by L$\infty$ approximations to cos},
	booktitle = {AIP Conference Proceedings},
	volume = {1618},
	number = {1},
	year = {2014},
	pages = {824{\textendash}827},
	publisher = {American Institute of Physics},
	organization = {American Institute of Physics},
	author = {Tsitouras, Ch and Katsikis, V.N.}
}
