| 000 | 00636nam a2200157 4500 | ||
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| 999 |
_c13317 _d13317 |
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| 008 | 190228b ||||| |||| 00| 0 eng d | ||
| 022 | _a0746-8342 | ||
| 082 | _aDPer 510.5 C697 Jan 2012-Sept 2015 v. 43 & 46, n. 1-4 | ||
| 100 |
_aFoote, Robert L. _937225 |
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| 245 |
_aAn intrinsic formula for the cross ratio in spherical and hyperbolic geometries/ _cRobert L. Foote and Xidian Sun. |
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| 260 |
_aWashington D. C.: _bMathematical Association of America, _c©Jul 2012-Sept 2015. |
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| 300 |
_av43 n3, pages 182--188: _bIllustrations; _c25 cm. |
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| 650 |
_aGeometry. _937226 |
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| 700 |
_aSun, Xidian _eAuthor. _937227 |
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| 942 |
_2ddc _cPER |
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