** 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.**

** A characterization of the rhombus, 16 (2016) 331--336. ****/br>
**** Putting the icosahedron into the octahedron, 17 (2017) 63--71. **

** Gergonne meets Sangaku, 17 (2017) 143--148. **

** On some elementary properties of quadrilaterals, 17 (2017) 473--482. **

** Parabola conjugate to rectangular hyperbola, 18 (2018) 87--92. **

**
**** 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.**

**
**** Peng, Junyao
**
** (with Y. Zhang) Heron triangle and rhombus pairs with a common area and a common perimeter, 17 (2017) 419--423. **

**
**** 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. **

**
**** Petrovic, Predrag B.
**
** (with M. M. Stevanovic and M. R. Stevanovic) Radii of circles in Apollonius' problem, 17 (2017) 359--372. **

**
**** 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.**

** Two hinged regular n-sided polygons, 18 (2018) 39--42.**

**
**** 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. **

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