Smith, Rebecca; Casselman, Ben (3 May 2010). "Rig owner under scrutiny". The Wall Street Journal. Archived from the original on 3 June 2013. Retrieved 30 May 2010.(subscription required)
Smith, Rebecca; Casselman, Ben (3 May 2010). "Rig owner under scrutiny". The Wall Street Journal. Archived from the original on 3 June 2013. Retrieved 30 May 2010.(subscription required)