@article{10_4064_ap97_1_3,
     author = {Qingliu Yao},
     title = {Positive solutions to a class of elastic
beam equations with semipositone nonlinearity},
     journal = {Annales Polonici Mathematici},
     pages = {35--50},
     publisher = {mathdoc},
     volume = {97},
     number = {1},
     year = {2010},
     doi = {10.4064/ap97-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap97-1-3/}
}