@article{NUMA_1968__12_131861,
     author = {A.L. ROARK and L.F. SHAMPINE},
     title = {On the {Eigenproblem} for {Displacement} {Integral} {Equations.}},
     journal = {Numerische Mathematik},
     pages = {170--179},
     publisher = {mathdoc},
     volume = {12},
     year = {1968},
     zbl = {0176.16202},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__12_131861/}
}