TY - JOUR AU - Mihăilescu, Mihai AU - Moroşanu, Gheorghe TI - Eigenvalues of −Δp − Δq Under Neumann Boundary Condition JO - Canadian mathematical bulletin PY - 2016 SP - 606 EP - 616 VL - 59 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2016-025-2/ DO - 10.4153/CMB-2016-025-2 ID - 10_4153_CMB_2016_025_2 ER -