Daria V. Pominova, Igor D. Romanishkin, Vera Yu. Proydakova, Pavel V. Grachev, Arkadiy S. Moskalev, Anastasia V. Ryabova, Vladimir I. Makarov, Kirill G. Linkov, Sergei V. Kuznetsov, Oleg V. Uvarov, Viktor B. Loschenov. Optimization of upconversion luminescence excitation mode for deeper in vivo bioimaging without contrast loss or overheating // Methods Appl. Fluoresc. 8 (2020) 025006