A Cubic Spherical Integral: 10771. - Mowaffaq Hajja; Peter Walker; Danny Arrigo; Xiaoshen Wang; Zafar Ahmed (Am. Math. Mon., 2000)

Fixed Points of Iterated Cyclic Difference Operators: 10676. - John Isbell; Stephen H. Schanuel; Stephen M. Gagola Jr.; Mowaffaq Hajja (Am. Math. Mon., 2000)

A Vector Proof of a Theorem of Bang. - Mowaffaq Hajja (Am. Math. Mon., 2001)

Other Versions of the Steiner-Lehmus Theorem. - Mowaffaq Hajja (Am. Math. Mon., 2001)

Copositive Symmetric Cubic Forms. - Mowaffaq Hajja (Am. Math. Mon., 2005)

The Arbitrariness of the Cevian Triangle. - Mowaffaq Hajja (Am. Math. Mon., 2006)

Some Elementary Aspects of Means. - Mowaffaq Hajja (Int. J. Math. Math. Sci., 2013)

Means and Their Inequalities. - Mowaffaq Hajja; Peter S. Bullen; Janusz Matkowski; Edward Neuman; Slavko Simic (Int. J. Math. Math. Sci., 2013)

Equicevian Points of a Triangle. - Sadi Abu-Saymeh; Mowaffaq Hajja; Hellmuth Stachel (Am. Math. Mon., 2015)

Another n-Dimensional Generalization of Pompeiu's Theorem. - Ghada Al-Afifi; Mowaffaq Hajja; Ahmad Hamdan (Am. Math. Mon., 2018)

Newton Quadrilaterals, the Associated Cubic Equations, and Their Rational Solutions. - Mowaffaq Hajja; Jonathan Sondow (Am. Math. Mon., 2019)