Aktekin, E., Ercan, E.N. Memiç, M., NGC6946 :Optical Search for Supernova Remnant Candidates, STEM Conference on Astrophysics and Space Research http:// casr2020.com online Summit on Astrophysics and Space Science 12-15 November, Lisbon, Portugal (oral presentation given by M. Memiç ) link in on www.youtube.com under the title above) 2020.