Scientific and Professional Journal of the Croatian Society for Geometry and Graphics

In Memoriam 
Mirko Polonijo: Academician Stanko Bilinski (1909. - 1998.) 

Original Scientific Papers 
Zdravka Božikov: On Symmetric Designs with Parameters (101,25,6) 
Marta Szilvási-Nagy: Closing Pipes by Extension of B-spline Surfaces 
Attila Böleskei, Emil Molnár: How to Design Nice Tilings? 
Ana Sliepčević: The Focal Curve of the Pencil and the Range of Conics
in an Isotropic Plane 

Professional Papers 
Miljenko Lapaine, Miroslava Lapaine: Curve of Centers of the Conic Section Pencil 

Geometry and Graphics 
Ana Sliepčević: To Mark the 100th Anniversary of Descriptive Geomety at the
University of Zagreb 
Lidija Pletenac: CAD Software Tools in Geometric Modelling 
Jelena Beban-Brkić, Nikoleta Sudeta: The Place of Geometry in Teaching 
Miljenko Lapaine and others: Drawing in Science 

News, Reports, Contributions

 
 
4 
 
 
11 
13 
21 

29 
 

35 

41 
43 
45 
48 

65