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@article{10_21136_CPM_1960_108384, author = {Vorl{\'\i}\v{c}ek, Hugo}, title = {P\v{r}ibli\v{z}n\'a konstrukce \'uhlu $40^\circ$}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky}, pages = {204}, publisher = {mathdoc}, volume = {085}, number = {2}, year = {1960}, doi = {10.21136/CPM.1960.108384}, zbl = {0101.13304}, language = {cs}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1960.108384/} }
Vorlíček, Hugo. Přibližná konstrukce úhlu $40^\circ$. Časopis pro pěstování matematiky, Tome 085 (1960) no. 2, p. 204. doi : 10.21136/CPM.1960.108384. http://geodesic.mathdoc.fr/articles/10.21136/CPM.1960.108384/
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