** Abraham, Hrvoje
**
**(with V. Kovac) From electrostatic potentials to yet another triangle center, 15 (2015) 73--89.**

**
**** Abu-Saymeh, Sadi
**
**(with M. Hajja) Triangle centers with linear intercepts and linear subangles, 5 (2005) 33--36.**

**(with M. Hajja) Some Brocard-like points of a triangle, 5 (2005) 65--74. **

**(with M. Hajja) Coincidence of centers for scalene triangles, 7 (2007) 137--146. **

**(with M. Hajja and H. A. ShahAli) Another variation of the Steiner-Lehmus theme, 8 (2008) 131--140. **

**
**** Akengin, Mehmet Efe
**
**(with Zeyd Yusuf Koroglu and Yigit Yargic) Three natural homoteties of the nine-point circle, 13 (2013) 209--218.**

**
**** Alperin, Roger C.
**
**A grand tour of pedals of conics, 4 (2004) 143--151. **

**The Poncelet pencil of rectangular hyperbolas, 10 (2010) 15--20. **

**Solving Euler's triangle problems with Poncelet's pencil, 11 (2011) 121--129. **

**Reflections on Poncelet's pencil, 15 (2015) 93--98.**

**
**** Alsina, Claudi
**
**(with R. B. Nelsen) A visual proof of the Erdos-Mordell inequality, 7 (2007) 99--102. **

**(with R. B. Nelsen) On the diagonals of a cyclic quadrilateral, 7 (2007) 147--149. **

**
**** Altintas, Abdilkadir
**
**Some collinearities in the heptagonal triangle, 16 (2016) 249--256. **

**
**** Anghel, Nicolae
**
**Minimal chords in angular regions, 4 (2004) 111--115. **

**A maximal parallelogram characterization of ovals having circles as orthoptic curves, 10 (2010) 21--25. **

**
**** Apostol, Tom M.
**
**(with M. A. Mnatsakanian) The method of the punctured containers, 7 (2007) 33--52. **

**(with M. A. Mnatsakanian) Volumes of solids swept tangentially around cylinders, 15 (2015) 13--44.**

**(with M. A. Mnatsakanian) Volumes of solids swept tangentially around general surfaces, 15 (2015) 45--72.**

**(with M. A. Mnatsakanian) Topological treatment of Platonic, Archimedean, and related polyhedra, 15 (2015) 243--251.**

**
**** Atzema, Eisso J.
**
**A theorem by Giusto Bellavitis on a class of quadrilaterals, 6 (2006) 181--185. **

**An elementary proof of a theorem by Emelyanov, 8 (2008) 201--204. **

**On n-sections and reciprocal quadrilaterals, 9 (2009) 1--17. **

**On a flawed, 16th-century derivation of Brahmagupta's formula for the area of a cyclic quadrilateral, 15 (2015) 165--179.**

**
**** Ayme, Jean-Louis
**
**Sawayama and Thebault's theorem, 3 (2003) 225--229. **

**A purely synthetic proof of the Droz-Farny line theorem, 4 (2004) 219--224. **

**
**** Azarian, Mohammed
**
**A study of Risala al-Watar wa'l Jaib (The Treatise on the Chord and Sine), 15 (2015) 229--242.**

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