For an introduction to the relationship between Existentialism and Buddhism, see Kevin Aho, Existentialism(2014), pp. 158-158 (Self and dukkha)

Some links, as provided by Danny Broderick

http://www.advaita.org.uk/
http://www.realization.org/
http://www.nonduality.com/
http://en.wikipedia.org/wiki/Nondualism
http://en.wikipedia.org/wiki/Zen

Advaita:

http://www.sriramanamaharshi.org/

Ken Wilbur on art/literary criticism:

http://in.integralinstitute.org/holons/KenWilber-IntegralArtandLiteraryTheory.pdf

'Where science and Buddhism meet'
http://www.youtube.com/watch?feature=iv&src_vid=qj_i7YqDwJA&v=ZlmrHMBW36w&annotation_id=annotation_51520
http://www.youtube.com/watch?v=qj_i7YqDwJA&feature=g-vrec&context=G2ebcfddRVAAAAAAAAAw