@article{SMJ2_2000_26_1_a3,
     author = {De Schepper, H.},
     title = {On {Finite} {Element} {Methods} for 2nd order (semi{\textendash}) periodic {Eigenvalue} {Problems}},
     journal = {Serdica Mathematical Journal},
     pages = {33--48},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2000_26_1_a3/}
}