@Book{Steinheil1869,
author  = "Steinheil, Carl August",
title   = "Ueber constructive Auflösung der sphärischen Dreiecke",
year    = "1869",
address = "München",
series  = "Sitzungsberichte",
volume  = "1869,2,14",
url     = "https://publikationen.badw.de/en/003393080",
}