Unusually low density regions in the compressed slow wind: Solar wind transients of small coronal hole originYong C.-M. Liu, Zhaohui Qi, Jia Huang, Chi Wang, Hui Fu, Berndt Klecker, Linghua Wang and Charles J. FarrugiaA&A, 635 (2020) A49DOI: https://doi.org/10.1051/0004-6361/201935884
