TY  - BOOK
AU  - Sala I
TI  - On the numerical solution of certain boundary vale problems and eigenvalue problems of the second and the fourth order with the aid of integral equations
U1  - 515.45 
PY  - 1963///
CY  - Helsinki
PB  - Acta Polytechnica Scandinavica
KW  - Boundary value problems
KW  - Calculus
ER  -