https://researchprofiles.ku.dk/en/publications/extreme-nonlinear-response-of-ultranarrow-optical-transitions-in-/
Extreme nonlinear response of ultranarrow optical transitions in cavity QED for laser stabilization...
https://research.ibm.com/publications/fractional-quantization-in-ultranarrow-electron-channels
Fractional quantization in ultranarrow electron channels for Physical Review B - IBM Research
Fractional quantization in ultranarrow electron channels for Physical Review B by T.P. Smith III et al.
https://researchportalplus.anu.edu.au/en/publications/microscopy-of-an-ultranarrow-feshbach-resonance-using-a-laser-bas/
Microscopy of an ultranarrow Feshbach resonance using a laser-based atom collider: A quantum defect...
https://iris.cnr.it/handle/20.500.14243/389631
Multiwavelength Raman spectroscopy of ultranarrow nanoribbons made by solution-mediated bottom-up...
raman spectroscopy