This design has been published by multiple design and environmental blogs, by authors all over the world. The following links show these publications.
http://www.trendhunter.com/trends/bisickle

http://www.greendiary.com/entry/bisickle-commuter-bicycle-concept-takes-commuter-biking-to-next-level/

http://www.good.is/post/meet-the-bisickle-a-commuter-bike-concept/

http://allwhitekicks.com/a-biking-concept-to-promote-cycling-commutes/