Gorakhnath and the Kanphata Yogis  
George Weston Briggs
Motilal Banarsidass Publ.
The cult of the Kanphata Yogis is a definite unit within Hinduism, and its study are essential for understanding this phase of the religious life of India. This has drawn upon various sources, such as the legends, folk-lore and the formulated texts of this sect.