1. Cabinet Office of the Government of Japan (Director-General for Policy on Cohesive Society) (2010). Wakamono no ishiki ni kansuru chōsa – Hikikomori ni kansuru jittai chōsa [Survey on Youth Consciousness – Survey on Hikikomori].
2. Cabinet Office of the Government of Japan (Director-General for Policy on Cohesive Society) (2016). Wakamono no seikatsu ni kansuru chōsa hōkokusho [Research Survey on Youth’s life].
3. Cabinet Office of the Government of Japan (Director-General for Policy on Cohesive Society) (2019). Seikatsu Jōkyō ni Kansuru Chōsa [Survey on Living Conditions].
4. Castel P.H. (2020) Il male che viene. Ed. Queriniana. Brescia
5. Delion, P. (2015) Mon combat pour une psychiatrie humaine. Paris: Albin Michel.