The age gender model of the insight face, which paper it based on?

Discussion
1

insightface got two model for age gender classification, but I can’t find any link of the paper, or which data they train/test on, do anyone know the details?Thanks

2

I am not sure but you could have a look at this dataset: IMDB-WIKI - 500k+ face images with age and gender labels

IMDB-WIKI – 500k+ face images with age and gender labels