Patrulater echidiagonal (Romanian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Patrulater echidiagonal" in Romanian language version.

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en Ball, D.G. (1973), „A generalisation of π”, Mathematical Gazette, 57 (402): 298–303, doi:10.2307/3616052 , Griffiths, David; Culpin, David (1975), „Pi-optimal polygons”, Mathematical Gazette, 59 (409): 165–175, doi:10.2307/3617699
en Gerdes, Paulus (1988), „On culture, geometrical thinking and mathematics education”, Educational Studies in Mathematics, 19 (2): 137–162, doi:10.1007/bf00751229, JSTOR 3482571

en Josefsson, Martin (2014), „Properties of equidiagonal quadrilaterals”, Forum Geometricorum, 14: 129–144
en Josefsson, Martin (2013), „Five Proofs of an Area Characterization of Rectangles” (PDF), Forum Geometricorum, 13: 17–21 .
en Josefsson, Martin (2012), „Characterizations of Orthodiagonal Quadrilaterals” (PDF), Forum Geometricorum, 12: 13–25 . See in particular Theorem 7 on p. 19

en Gerdes, Paulus (1988), „On culture, geometrical thinking and mathematics education”, Educational Studies in Mathematics, 19 (2): 137–162, doi:10.1007/bf00751229, JSTOR 3482571
en Silvester, John R. (2006), „Extensions of a theorem of Van Aubel”, The Mathematical Gazette, 90 (517): 2–12, JSTOR 3621406