Autor:	Landsberg, P. T., Tabor, H., Rogers, F. E., Jeffery, J. W., Brinkworth, B. J.
Zdroj:	Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1980 Feb 01. 295(1414), 375-377.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/36601 Zobrazit plný text záznamu