TY - JOUR AU - De Schepper, H. TI - On Finite Element Methods for 2nd order (semi–) periodic Eigenvalue Problems JO - Serdica Mathematical Journal PY - 2000 SP - 33 EP - 48 VL - 26 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SMJ2_2000_26_1_a3/ LA - en ID - SMJ2_2000_26_1_a3 ER -