The Serpens filament at the onset of slightly supercritical collapseY. Gong, G. X. Li, R. Q. Mao, C. Henkel, K. M. Menten, M. Fang, M. Wang and J. X. SunA&A, 620 (2018) A62DOI: https://doi.org/10.1051/0004-6361/201833583