Blanchard, R. Les sphères de Hagge d’un polyedre à sommets cospheriques. (French) Zbl 0029.06801 C. R. Acad. Sci., Paris 225, 980-982 (1947). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:Elementary geometry PDF BibTeX XML Cite \textit{R. Blanchard}, C. R. Acad. Sci., Paris 225, 980--982 (1947; Zbl 0029.06801)