Yanto Soegiarto (January 3, 2012). "Austria's green power". thejakartaglobe.com. Jakarta Globe. Archived from the original on June 20, 2013. Retrieved 18 June 2013.
Yanto Soegiarto (January 3, 2012). "Austria's green power". thejakartaglobe.com. Jakarta Globe. Archived from the original on June 20, 2013. Retrieved 18 June 2013.