Problem 10796. - Floor van Lamoen (Am. Math. Mon., 2000)

Problem 10830. - Floor van Lamoen (Am. Math. Mon., 2000)

Morley Related Triangles on the Nine-Point Circle. - Floor van Lamoen (Am. Math. Mon., 2000)

Beyond the De Longchamps Point: 10734. - Floor van Lamoen; Jany C. Binz (Am. Math. Mon., 2000)

Euler Lines Concurrent on the Nine-Point Circle: 10796. - Floor van Lamoen; W. Weston Meyer (Am. Math. Mon., 2001)

Circumcenters on a Circle: 10830. - Floor van Lamoen (Am. Math. Mon., 2002)

Problem 11038. - Floor van Lamoen (Am. Math. Mon., 2003)

Problem 11025. - Floor van Lamoen; Darij Grinberg (Am. Math. Mon., 2003)

Six Surprises from Four Lines: 11025. - Floor van Lamoen (Am. Math. Mon., 2005)

Morley's Triangle and Lemma: 11038. - Floor van Lamoen; Michel Bataille (Am. Math. Mon., 2005)