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@article{10_21136_CPM_1973_117808, author = {Havrda, Jan}, title = {K zobecn\v{e}n{\'\i} pojmu projektor}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky}, pages = {265--268}, publisher = {mathdoc}, volume = {098}, number = {3}, year = {1973}, doi = {10.21136/CPM.1973.117808}, mrnumber = {0377484}, zbl = {0259.46023}, language = {cs}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1973.117808/} }
Havrda, Jan. K zobecnění pojmu projektor. Časopis pro pěstování matematiky, Tome 098 (1973) no. 3, pp. 265-268. doi : 10.21136/CPM.1973.117808. http://geodesic.mathdoc.fr/articles/10.21136/CPM.1973.117808/
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