| Title:
             | 
O úhlu dvou rovin v prostoru čtyřrozměrném (Czech) | 
| Title:
             | 
On the angle of two planes in a fourdimensional space (English) | 
| Title:
             | 
Über den Winkel von zwei Ebenen im vierdimensionalem Raume (German) | 
| Title:
             | 
Sur l’angle de deux plans dans l’espace à quatre dimensions (French) | 
| Author:
             | 
Seifert, Ladislav | 
| Language:
             | 
Czech | 
| Journal:
             | 
Časopis pro pěstování matematiky a fysiky | 
| ISSN:
             | 
1802-114X (printed edition, 1872-1950) | 
| Volume:
             | 
52 | 
| Issue:
             | 
1 | 
| Year:
             | 
1923 | 
| Pages:
             | 
138-148 | 
| Summary lang:
             | 
French | 
| . | 
| Category:
             | 
math | 
| . | 
| idZBL:
             | 
JFM 49.0487.02 | 
| DOI:
             | 
10.21136/CPMF.1923.123265 | 
| . | 
| Date available:
             | 
2009-08-29T16:28:30Z | 
| Last updated:
             | 
2020-07-29 | 
| Stable URL:
             | 
http://hdl.handle.net/10338.dmlcz/123265 | 
| . |