http://www.advaita.org.uk/discourses/teachers/key_issues.htm advaita-vision
http://swamij.com/yoga-sutras-41517.htm yoga
http://www.eng.vedanta.ru/library/coomaraswamy/what_has_India_contributed_to_human_welfare.php vedanta
http://www.anandgholap.net/#Authorwise_Index_of_All_Books_ Theosophy-Index
http://www.sacred-texts.com/eso/sob/sob17.htm science-breathing