@article{SEMR_2012_9_a13,
author = {D. Yu. Sokolova},
title = {On trapezoid area on the {Lobachevskii} plane},
journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
pages = {256--260},
year = {2012},
volume = {9},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/SEMR_2012_9_a13/}
}
D. Yu. Sokolova. On trapezoid area on the Lobachevskii plane. Sibirskie èlektronnye matematičeskie izvestiâ, Tome 9 (2012), pp. 256-260. http://geodesic.mathdoc.fr/item/SEMR_2012_9_a13/
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