# Relation between oscillator strengths $\log{gf}$ and the Einstein $A$-coefficient, rotational quantum number,

I'm analyzing the spectra of M dwarfs. Some authors characterize the lines with the oscillator strengths $$\log{gf}$$ while others follow different paths with the Einstein $$A$$-coefficient. I would like to know if there is relation between the oscillator strengths $$\log{gf}$$, and the Einstein $$A$$-coefficient, rotational quantum number J', vibrational levels with the Hönl-London, factors or similar parameters.