Oscar Wilde (2014). “The Complete Short Stories: The Model Millionaire + The Canterville Ghost + The Happy Prince + The Star-Child + The Fisherman And His Soul + The Selfish Giant + The Nightingale And The Rose + The Sphinx Without A Secret + many more...”, p.203, e-artnow
"A New Model of the Universe: Principles of the Psychological Method in Its Application to Problems of Science, Religion and Art". Book by P.D. Ouspensky, 1931.