Guidance on technical requirements for regulated food and feed product applications to establish the presence of small particles including nanoparticles, More, Simon, Bampidis Vasileios, Benford Diane, Bragard Claude, Halldorsson Thorhallur, Hernández?Jerez Antonio, Hougaard Bennekou, Susanne, Koutsoumanis Kostas, Lambré Claude, Kyriaki Machera, et al. , EFSA Journal, Jan-08-2021, Volume 19, Issue 8, (2021)