Hello,everyone!
Now I am working on a experiment about subsea natural gas release,but I know little about it. Today I search and find some paper and book about it,but I can't download them.I listed their information as follows,please you can help me.I am in great need of these materials.

(1)Bettelini, M. and Fanneløp, T.K. (1993) Underwater plume from an instantaneously started source. Applied Ocean Research 15, pp 195-206
(2)Fanneløp, T.K.and Sjøen, K. (1980) Hydrodynamics of underwater blowouts. AIAA
Paper 80-0219.
(3)Engebretsen, T., Northug, T., Sjøen, K. and Fanneløp, T.K. (1997) Surface flow and
gas dispersion from a subsea release of natural gas. Seventh (1997) International Off-
shore and Polar Engineering Conference, Honolulu, USA, May 25-30, 1997.