Simple method to measure rheological properties of soft surfaces by a micro-needle contact Tadashi Kajiya, Daisuke Sawai, Koji Miyata, Yosuke Miyashita and Hiroyuki Noda Eur. Phys. J. E, 45 9 (2022) 76 Published online: 14 September 2022 DOI: 10.1140/epje/s10189-022-00227-w