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Wolfram Web
Resource Meissner, Ernst; Schilling,
Friedrich (1912), "Drei
Gipsmodelle von Flächen
konstanter Breite", Z. Math. Phys., 60: 92–94 Weber, Christof...
- Bibcode:2007arXiv0704.3248G Meißner, Ernst; Schilling,
Friedrich (1912), "Drei
Gipsmodelle von Flächen
konstanter Breite", Z. Math. Phys., 60: 92–94. Spheroforms...
- de.
Retrieved 20 June 2019. Zimmermann, Eva (October 2008). "Grimms
Gipsmodelle".
Architectural Digest. p. 68. "Architekturikonen" [architectural icons]...
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location missing publisher (link) Zimmermann, Eva (October 2008). "Grimms
Gipsmodelle".
Architectural Digest: Best of Germany. New York:
Architectural Digest...