@article{bwmeta1.element.desklight-ef06893f-0ae2-4ebe-ba1a-4fbb779f728e,
author = {K. Radziszewski},
title = {$\pi$-geodesics and lines of shadow},
journal = {Colloquium Mathematicae},
volume = {25},
year = {1972},
pages = {157-163},
zbl = {0249.53010},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-ef06893f-0ae2-4ebe-ba1a-4fbb779f728e}
}
K. Radziszewski. π-geodesics and lines of shadow. Colloquium Mathematicae, Tome 25 (1972) pp. 157-163. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-ef06893f-0ae2-4ebe-ba1a-4fbb779f728e/