The term "Out of Africa I" is informal and somewhat rare. The phrase Out of Africa used on its own generally refers to "Out of Africa II", the expansion of anatomically modern humans into Eurasia. "Out of Africa I" is used in 2004, in Marco Langbroek, 'Out of Africa': an investigation into the earliest occupation of the Old World, p. 61, and as the title of a collection of essays, J. G. Fleagle et al. (eds.), Out of Africa I: The First Hominin Colonization of Eurasia (2010). see also: Herschkovitz, Israel; et al. The earliest modern humans outside Africa. Science. 26 January 2018, 359 (6374): 456–459. Bibcode:2018Sci...359..456H. PMID 29371468. doi:10.1126/science.aap8369. hdl:10072/372670.; Hurtley, Stella; Szuromi, Phil. Out of Africa Revisited. Science. 2005, 308 (5724): 922. S2CID 220100436. doi:10.1126/science.308.5724.921g.
Zhu Zhaoyu (朱照宇); Dennell, Robin; Huang Weiwen (黄慰文); Wu Yi (吴翼); Qiu Shifan (邱世藩); Yang Shixia (杨石霞); Rao Zhiguo (饶志国); Hou Yamei (侯亚梅); Xie Jiubing (谢久兵); Han Jiangwei (韩江伟); Ouyang Tingping (欧阳婷萍). Hominin occupation of the Chinese Loess Plateau since about 2.1 million years ago. Nature. 2018, 559 (7715): 608–612. Bibcode:2018Natur.559..608Z. ISSN 0028-0836. PMID 29995848. S2CID 49670311. doi:10.1038/s41586-018-0299-4. "Eight major magnetozones are recorded in the Shangchen section, four of which have normal polarity (N1 to N4) and four of which have reversed polarity (R1 to R4). By comparison with the geomagnetic polarity timescale [...] magnetozone N4 corresponds to the Réunion excursion (2.13–2.15 Ma) in L28."
Lahr, M. M. Saharan Corridors and Their Role in the Evolutionary Geography of 'Out of Africa I'. Baden, A.; et al (编). Out of Africa I: The First Hominin Colonization of Eurasia. Springer Netherlands. 2010: 27–46. ISBN 978-90-481-9035-5.