Hopeless, D. WWE. Volume three, Roman empire, 2018: p. 5 (illustrated by Serg Acuña)

Bēhance WWW site, August 16, 2018 (Serg Acuña; San José, Costa Rica ; illustrator, graphic designer) https://www.behance.net/SergChayote

OCLC, August 16, 2018 (access point: Acuña, Serg; usage: Serg Acuña)