Editing Projective line over a ring (section)

== Further reading ==
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* {{citation |first=G. |last=Ancochea |date=1942 |title=Le théorèm de von Staudt en géométrie projective quaternionienne |journal=Journal für die reine und angewandte Mathematik |volume=184 |pages=193–198 |doi=10.1515/crll.1942.184.193}}
* {{citation |first=N. B. |last=Limaye |date=1972 |title=Cross-ratios and Projectivities of a line |journal=[[Mathematische Zeitschrift]] |volume=129 |pages=49–53 |doi=10.1007/BF01229540 |mr=0314823 }}
* {{citation |first1=B.V. |last1=Limaye |first2=N.B. |last2=Limaye |date=1977 |title=The Fundamental Theorem for the Projective Line over Commutative Rings |journal=Aequationes Mathematica |volume=16 |issue=3 |pages=275–281 |doi=10.1007/BF01836039 |mr=0513873 }}
* {{citation |first1=B.V. |last1=Limaye |first2=N.B. |last2=Limaye |date=1977 |title=The Fundamental Theorem for the Projective Line over Non-Commutative Local Rings |journal=[[Archiv der Mathematik]] |volume=28 |issue=1 |pages=102–109 |doi=10.1007/BF01223897 |mr=0480495 }}
* {{citation |first=Marcel |last=Wild |date=2006 |title=The Fundamental Theorem of Projective Geometry for an Arbitrary Length Two Module |journal=[[Rocky Mountain Journal of Mathematics]] |volume=36 |issue=6 |pages=2075–2080 |doi=10.1216/rmjm/1181069362 }}
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