$a Kp. A history of the calaculus of variations from the 17th through the 19th century / Herman H. Goldstine. - New York, 1980. $b (IBM Research, Yorktown Heights, New York, USA ; Institute for Advanced Study, Princeton, New Jersey, USA)
670
$a LCC online
670
$a Mr. Babbage's secret / Ole Immanuel Franksen. - Birkerd, 1984. $b Przedm.