Surfacese
Geuss, Carl Friedrich.
Disquisitiones generales circa superficies curvas. Gottingae: typis Dieterichianis. MDCCCXXVIII. 50 ppe 4° **5022.56
Samee (In Koenigliche Gesellschaft der Wissenschaften, Goettingen-e Commentaiones. Classis mathematicae T. 6, pps» 99-146~- Gottingae, MDCCCXXVIII. *3304.1.6
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