1. Autodesk: 3DS Max chamfer modifier.
www.help.autodesk.com
2. Blender Foundation: Bevel geometry tool in Blender.
www.docs.blender.org/manual
3. Blender Foundation: Blender shader for round edges.
www.docs.blender.org/manual
4. Blender Foundation: Subdivision tool in Blender.
www.docs.blender.org/manual
5. Blender Foundation: Blender (2018).
www.blender.org