Ch J. A. Hakkaart
- Design and construction of North America's largest unbraced cofferdam. Dans: Tunnelling and Underground Space Technology, v. 11, n. 4 (octobre 1996). (1996):
- Transport of tunnel elements from Baltimore to Boston, over the Atlantic Ocean. Dans: Tunnelling and Underground Space Technology, v. 11, n. 4 (octobre 1996). (1996):