Early Geometrical Thinking in the Environment of Patterns, Mosaics and IsometriesRead from page 1 to page 22.(Sections, I. Introduction, 2. Theoretical Considerations and 3. Early Geometrical Thinking in Research Early Geometrical Thinking (3-3.3)
Swoboda, E., & Vighi, P. (2016). Early Geometrical Thinking in the Environment of Patterns, Mosaics and Isometries (ICME-13 Topical Surveys). Cham: Springer International Publishing. Open Access (CC BY-SA 4.0)