Life symbols : A brief study into the origin and significance of certain symbols which have been found in all civilisations, such as the cross, the circle, the serpent, the triangle, the tree of life, the swastika, and other solar emblems, showing the unity and simplicity of thought underlying their use as religious symbols

The art of Ramon Lull

Interpretazione dell'albero della Kaballah

The Tree of Life : An Archaeological Study

De Boom

En soph - en reichit (sans fin - sans commencement) "Scha'are'Orah - Portae Lucis" ou la Métaphysique de la Gnose juive