1. Harmonic ovals

   • Paola Biondi
   • Nicola Durante
   • Tim Penttila

   OriginalPaper Open access 09 May 2024 Article: 22

2. Morley’s triangles of a triangle in the isotropic plane

   • Ružica Kolar-Šuper
   • Vladimir Volenec

   OriginalPaper 07 May 2024 Article: 21

   

3. Surfaces with concentric or parallel K-contours

   • Shoichi Fujimori
   • Yu Kawakami
   • Masatoshi Kokubu

   OriginalPaper 05 May 2024 Article: 20

   

4. Ordered absolute geometry

   • Rolf Struve

   OriginalPaper 06 April 2024 Article: 19