Combination of CN(1-0), HCN(1-0), and HNC(1-0): A possible indicator for a high-mass star formation sequence in the Milky WayX. H. Han, J. J. Zhou, J. Z. Wang, J. Esimbek, J. S. Zhang and N. WangA&A, 576 (2015) A131DOI: https://doi.org/10.1051/0004-6361/201423791
