| Title: | Co jest geometrické místo pat kolmic, vedených z ohniska ellipsy, hyperboly a paraboly na tečny (Czech) | 
| Title: | What are the loci of intersections of tangents of ellipse, hyperbola and parabola with their normals containing the focus (English) | 
| Author: | Hübner, V. | 
| Language: | Czech | 
| Journal: | Časopis pro pěstování mathematiky a fysiky | 
| ISSN: |  | 
| Volume: | 10 | 
| Issue: | 5 | 
| Year: | 1881 | 
| Pages: | 278-280 | 
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| Category: | math | 
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| DOI: | 10.21136/CPMF.1881.109378 | 
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| Date available: | 2009-08-29T12:19:09Z | 
| Last updated: | 2020-07-28 | 
| Stable URL: | http://hdl.handle.net/10338.dmlcz/109378 | 
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