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Number of items: **3**.

Kurusa, Árpád, Kozma, József:
*Euler’s ratio-sum formula in projective-metric spaces.*

BEITRAGE ZUR ALGEBRA UND GEOMETRIE, 60 (2).
pp. 379-390.
ISSN 0138-4821
(2018)

Kozma, József, Kurusa, Árpád:
*Hyperbolic is the only Hilbert geometry having circumcenter or orthocenter generally.*

BEITRAGE ZUR ALGEBRA UND GEOMETRIE, 57 (1).
pp. 243-258.
ISSN 0138-4821
(2016)

Kozma, József, Kurusa, Árpád:
*Ceva's and Menelaus' theorems characterize the hyperbolic geometry among Hilbert geometries.*

JOURNAL OF GEOMETRY, 106 (3).
pp. 465-470.
ISSN 0047-2468
(2015)