This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
NestedSetModel.svg en An example of nested set Nestedsetmodel UTC Nestedsetmodel Sherahm derivative work xar talk Retouched converting to svg format Cameron Behar Nestedsetmodel own Sherahm Uploaded with derivativeFX Databases
Page 2023 Free-images.com. All images are Public Domain