Помогите пожалуйста с двумя публикациями:
1. Near-infrared imaging via upconversion in Er3+:CaF2 crystal with dual wavelength excitation
- DOI:
http://dx.doi.org/10.1364/OL.526062
2. Multicolor-emitting Er3+ and Er3+/Yb3+ doped Zn2GeO4 phosphors combining static and dynamic identifications for advanced anti-counterfeiting application
- DOI:
http://dx.doi.org/10.1016/j.saa.2023.123830
Заранее благодарю!