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.