- From the 1/7 ellipse to butterfly wings and rosetas in plane and space2011 | Faculty of Education
- Orbits of Centroids of variableTriangles and Quadrangles I2009 | Faculty of Mathematics and Physics
- Orbits of Centroids of variableTriangles and Quadrangles I2009 | Faculty of Education
- On one-Seventh Ellipse and one-Thirteenth Hyperbola I2007 | Faculty of Mathematics and Physics, Faculty of Education
- On one-Seventh Ellipse and one-Thirteenth Hyperbola II2007 | Faculty of Mathematics and Physics, Faculty of Education
- On one-Seventh Ellipse and one-Thirteenth Hyperbola I2007 | Faculty of Education
- On one-Sevents Ellips and one-Thirteenth Hyperbola II2007 | Faculty of Education
- How are moving centres of variable triangles with common circumcircle2007 | Faculty of Education
- Let us see using Cabri onto less known and unknown corners of geometry. Part 42006 | Faculty of Education
- How many centroids has a polygon?2006 | Faculty of Education

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