@article{10_4064_sm_135_2_191_201,
     author = {Andrzej Szulkin and  },
     title = {Eigenvalue problems with indefinite weight},
     journal = {Studia Mathematica},
     pages = {191--201},
     publisher = {mathdoc},
     volume = {135},
     number = {2},
     year = {1999},
     doi = {10.4064/sm-135-2-191-201},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-135-2-191-201/}
}