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    Pamfilos, Paris
      On some actions of D_3 on the triangle, 4 (2004) 157--176.
      The cyclic complex of a cyclic quadrilateral, 6 (2006) 29--46.
      Orthocycles, bicentrics, and orthodiagonals, 7 (2007) 73--86.
      On the Newton line of a quadrilateral, 9 (2009) 81--98.
      Conic homographies and bitangent pencils, 9 (2009) 229--257.
      Three maximal cyclic quadrangles, 10 (2010) 99--107.
      Triangles with given incircle and centroid, 11 (2011) 27--51.
      On tripolars and parabolas, 12 (2012) 287--300.
      Pairings of circles and Sawayama's theorem, 13 (2013) 117--131.
      The associated harmonic quadrilateral, 14 (2014) 15--29.
      A gallery of conics by five elements, 14 (2014) 295--348.
      Some remarks on a Sangaku from Chiba, 15 (2015) 275--280.
      The triangle construction { α, b-c, t_A}, 16 (2016) 115--117.
      On the diagonal and inscribed pentagons of a pentagon, 16 (2016) 207--225.
      Putting the icosahedron into the octahedron, 17 (2017) 63--71.
      Gergonne meets Sangaku, 17 (2017) 143--148.
    Parish, James L.
      On the derivative of a vertex polynomial, 6 (2006) 285--288.
    Park, Poo-Sung
      Regular polytopic distances, 16 (2016) 227--232.
    Parry, Cyril
      The isogonal tripolar conic, 1 (2001) 33--42.
    Patrascu, Ion
      (with C. Barbu) Some properties of the Newton-Gauss line, 12 (2012) 149--152.
    Paunic, Djura
      (with P. Yiu) Regular polygons and the golden section, 16 (2016) 273--281.
    Pennisi, Mario
      (with M. F. Mammana and B. Micale) On the centroids of polygons and polyhedra, 8 (2008) 121--130.
      (with M. F. Mammana and B. Micale) Orthic quadrilaterals of a convex quadrilateral, 10 (2010) 79--91.
      (with M. F. Mammana and B. Micale) The Droz-Farny circles of a convex quadrilateral, 11 (2011) 109--119.
      (with M. F. Mammana and B. Micale) Properties of valtitudes and vaxes of a convex quadrilateral, 12 (2012) 47--61.
      (with D. Ferrarello and M. F. Mammana) Pedal polygons, 13 (2013) 153--164.
    Perrin, Daniel
      (with A. Hess and M. Trense) A group theoretic interpretation of Poncelet's theorem -- the real case, 16 (2016) 381--395.
    Pham, Ngoc Mai
      (with T. O. Dao and T. D. Nguyen) A strengthened version of the Erdos-Mordell inequality, 16 (2016) 317--321.
    Pietsch, Manfred
      The golden ratio and regular polygons, 17 (2017) 17--19.
    Pohoata, Cosmin
      (with P. Yiu) On a product of two points induced by their cevian triangles, 7 (2007) 169--180.
      On the Parry reflection point, 8 (2008) 43--48.
      A short proof of Lemoine's theorem, 8 (2008) 97--98.
      A note on the anticomplements of the Fermat points, 9 (2009) 119--123.
      On the Euler reflection point, 10 (2010) 157--163.
      (with L. Gonzalez) On the intersections of the incircle and the cevian circumcircle of the incenter, 12 (2012) 141--148.
    Pop, Ovidiu T.
      (with M. Bencze) Congruent contiguous excircles, 14 (2014) 397--402.
    Power, Frank
      Some more Archimedean circles in the arbelos, 5 (2005) 133--134.
    Powers, Christa
      (with C. Nielsen) Intersecting equilateral triangles, 13 (2013) 219--225.
    Powers, Robert
      (with M. Baker) A stronger triangle inequality for neutral geometry, 7 (2007) 25--29.
      (with C. Biro) A strong triangle inequality in hyperbolic geometry, 16 (2016) 99--114.