Citrinin Determination in Food and Food Supplements by LC-MS/MS: Development and Use of Reference Materials in an International Collaborative Study, Tangni, Emmanuel, Van Hove François, Huybrechts Bart, Masquelier Julien, Vandermeiren Karine, and Van Hoeck Els , Toxins, Jan-04-2021, Volume 13, Issue 4, (2021)