(1752) “LXXII. An engine for raising water by fire; being on improvement of saver'y construction, to render it capable of working itself, invented by Mr. De Moura of Portugal, F. R. S. Described by Mr. J. Smeaton”, Philosophical Transactions of the Royal Society of London47, p. 436–438. doi:10.1098/rstl.1751.0073.
"De Architectura": Ĉapitro VI (paragrafo 2a)
el "Ten Books on Architecture" de Vitruvius (1a jarcento a.n.e.), publikigita la 17an de Junio, 2008 [1] alirita en 2009-07-07