·Watson, G. (2014) Philosophy of emptiness. Reaktion Books. 

·Newton, M. (2023) Journey of souls: Case studies of life between lives. Woodbury, MN: Llewellyn Publications.

·Schamoni, P. and Ernst, M. (1974) Max Ernst: Maximiliana: Die widerrechtliche ausubung der astronomie = l’exercice illegal de l’astronomie = the illegal practice of Astronomy. Munchen: Bruckmann. 

·Lucretius. The Nature of Things, trans. A. E. Stallings(2007).

·L. M. Krause.( 2012)‘The Godless Particle’, Newsweek.

·Bhikkhu Nanamoli and Bhikkhu Bodhi, trans, The Middle Length Discourses of the Buddha (Boston, ma, 1995).

·BBC television programme The Wonders of the Universe, presented by Professor B. Cox, bbc Four, 28 January 2012.

·Yu Youhan 余友涵: Circle 1986-8 圓系列1986－8: New wave beyond yuanmingyuan: An important European private collection of Chinese contemporary art: 2022 (no date) Sotheby’s. Available at: https://www.sothebys.com/en/buy/auction/2022/new-wave-beyond-yuanmingyuan-an-important-european-private-collection-of-chinese-contemporary-art/yu-youhan-yu-you-han-circle-1986-8-yuan-xi-lie1986 (Accessed: 18 April 2024). 

·The Middle Lengtgh Discourses of the buddha, a translation of the majjhima-nikāya (2002). Oxford: Pali Text Society. 

·Sotheby’s (2018) Voices of the infinite: Contextualizing Yu Youhan, Sothebys.com. Available at: https://www.sothebys.com/en/articles/voices-of-the-infinte-contextualizing-yu-youhan (Accessed: 18 April 2024). 

·Ernst, M. (1970) Max Ernst: Les Peupliers, 1939, Art Basel. Available at: https://www.artbasel.com/catalog/artwork/89773/Max-Ernst-Les-Peupliers (Accessed: 12 May 2024). 

·À la recherche de Vera Molnar – artworks by Vera Molnar and homages by internationally acclaimed artists (no date) Ludwig Museum. Available at: https://www.ludwigmuseum.hu/en/exhibition/la-recherche-de-vera-molnar-artworks-vera-molnar-and-homages-internationally-acclaimed (Accessed: 28 April 2024). 

·About Us (2023) Rudolf Steiner House. Available at: https://rsh.anth.org.uk/about-us/ (Accessed: 12 May 2024).