The Reciprocal of The Butterfly Theorem, Ion Patrascu, Florentin Smarandache
Branch Mathematics and Statistics Faculty and Staff Publications

THE GEOMETRY OF THE ORTHOLOGICAL TRIANGLES, Florentin Smarandache, Ion Patrascu
Branch Mathematics and Statistics Faculty and Staff Publications

Complements to Classic Topics of Circles Geometry, Florentin Smarandache, Ion Patrascu
Branch Mathematics and Statistics Faculty and Staff Publications

Variance on topics of plane geometry, Florentin Smarandache, Ion Patrascu
Branch Mathematics and Statistics Faculty and Staff Publications

THE GEOMETRY OF HOMOLOGICAL TRIANGLES, Florentin Smarandache, Ion Patrascu
Branch Mathematics and Statistics Faculty and Staff Publications

Two triangles with the same orthocenter and a vectorial proof of Stevanovic's theorem, Florentin Smarandache, Ion Patrascu
Branch Mathematics and Statistics Faculty and Staff Publications