https://www.g-casa.com/conferences/berlin17/pdf%20paper/Owarish%20US%20EU%20Relation.pdf

https://www.g-casa.com/conferences/bangkok18/pdf_ppt/Owarish.pdf

https://www.g-casa.com/conferences/prague15/pdf_paper/Owarish.pdf

http://www.g-casa.com/conferences/berlin17/ppt%20pdf/Owarish%20Climate%20Change.pdf