Variations in the Star Formation Efficiency of the Dense Molecular Gas across the Disks of Star-forming Galaxies - Usero, A. et al. 2015
The EMPIRE Survey: Systematic Variations in the Dense Gas Fraction and Star Formation Efficiency from Full-disk Mapping of M51 - Bigiel, F. et al. 2016
Optical Depth Estimates and Effective Critical Densities of Dense Gas Tracers in the Inner Parts of Nearby Galaxy Discs - Jiménez Donaire, M. J., et al. 2017