I can provide many of these in PDF form upon request as needed.
Varieties of Tulpa Experiences: Sentient Imaginary Friends, Embodied Joint Attention, and Hypnotic Sociality in a Wired World by Samuel Veissière, 2015.
Tracking the Tulpa: Exploring the "Tibetan" Origins of a Contemporary Paranormal Idea by Natasha L. Mikles and Joseph P. Laycock, 2015.
Tulpas and Mental Health: A Study of Non-Traumagenic Plural Experiences by Jacob J. Isler, 2017.
Learning to Discern the Voices of Gods, Spirits, Tulpas, and the Dead by Tanya M Luhrmann, Ben Alderson-Day, Ann Chen, Philip Corlett, Quinton Deeley, David Dupuis, Michael Lifshitz, Peter Moseley, Emmanuelle Peters, Adam Powell, Albert Powers III, 2023.
Neuroholographic Organisms: An Independent Study of Sentient Thoughtforms by Graeme C. Nash, 2016.
Unusual experiences and their association with metacognition: investigating ASMR and Tulpamancy by Emma Palmer-Cooper, Nicola McGuire, Abigail Wright, 2021.
Personality Characteristics of Tulpamancers and Their Tulpas by Anna Martin, Bailey Thompson, and Steven Lancaster, 2020.