Hacar, Fernando
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Tunnels with rough walls and cavities ; Túneles con paramen..:

Vigne, Gabriele ; Jönsson, Jimmy ; Hacar, Fernando
https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/3939/3418.  , 2014
 
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2

Tunnels with rough walls and cavities:

Gabriele Vigne ; Jimmy Jönsson ; Fernando Hacar
http://revistas.uptc.edu.co/revistas/index.php/ingenieria_sogamoso/article/view/3939.  , 2014
 
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