1
Finite-difference methods for partial differential equations /
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2
Multigrid methods. 3 : European conference on multigrid methods 3: proceedings : Bonn, 01.10.90-04.10.90 /
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3
The Mathematical foundations of the finite element method with applications to partial differential equations : [proceedings of a symposium,cUniversity of Maryland, Baltimore County, 1972 ] /
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