G Mignonac. CR 170 (1920) 936 (http://gallica.bnf.fr/scripts/get_page.exe?O=3123&E=935&.PDF)
(http://gallica.bnf.fr/scripts/get_page.exe?O=3123&E=935&.PDF)H Schiff. Ber 12 (1879) 1698 (http://gallica.bnf.fr/scripts/get_page.exe?O=90689&E=336&.PDF)
(http://gallica.bnf.fr/scripts/get_page.exe?O=90689&E=336&.PDF); the actual reference (Fileti and Piccini. Ber 12 (1879) 1700 (http://gallica.bnf.fr/scripts/get_page.exe?O=90689&E=337&.PDF)
(http://gallica.bnf.fr/scripts/get_page.exe?O=90689&E=337&.PDF) is mentioned in Schiff's correspondance.H A Michaël and J Jeanprêtre. Ber 25 (1892) 1678 (http://gallica.bnf.fr/scripts/get_page.exe?O=90725&E=1682&.PDF)
(http://gallica.bnf.fr/scripts/get_page.exe?O=90725&E=1682&.PDF)A Bischler. Ber 26 (1893) 1891 (http://gallica.bnf.fr/scripts/get_page.exe?O=90729&E=744&.PDF)
(http://gallica.bnf.fr/scripts/get_page.exe?O=90729&E=744&.PDF)E Bourgeois and J Dambmann. Ber 26 (1893) 2856 (http://gallica.bnf.fr/scripts/get_page.exe?O=90730&E=558&.PDF)
(http://gallica.bnf.fr/scripts/get_page.exe?O=90730&E=558&.PDF)BNF (http://gallica.bnf.fr)
(http://gallica.bnf.fr) website.