7. Freymon
Geschichte der Wissenschaften in Deutschland Bd. 18, Abth. 1, GDML_Books, (1880), p. 512 / Harvested from
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     title = {7. Freymon},
     booktitle = {Geschichte der Wissenschaften in Deutschland Bd. 18, Abth. 1},
     series = {GDML\_Books},
     year = {1880},
     pages = {512},
     url = {http://dml.mathdoc.fr/item/PPN372047610+dmdlog111}
}

 (éd.). 7. Freymon, dans Geschichte der Wissenschaften in Deutschland Bd. 18, Abth. 1, GDML_Books,  (1880), p. 512. http://gdmltest.u-ga.fr/item/PPN372047610+dmdlog111/