@misc{De_Tilly_Joseph_Marie_(1837–1906)_Essai_1879,
 author={De Tilly, Joseph Marie (1837–1906)},
 copyright={Public Domain},
 address={Bruxelles},
 howpublished={online},
 year={1879},
 publisher={G. Mayolez},
 language={fre},
 type={Text},
 title={Essai sur les principes fondamentaux de la géométrie et de la mécanique},
 URL={http://www.rcin.org.pl/impan/Content/66918/PDF/WA35_15101_7217_Essai-sur-les.pdf},
}