@article{10_21136_AM_1981_103918,
     author = {Lov{\'\i}\v{s}ek, J\'an},
     title = {Duality in the obstacle and unilateral problem for the biharmonic operator},
     journal = {Applications of Mathematics},
     pages = {291--303},
     publisher = {mathdoc},
     volume = {26},
     number = {4},
     year = {1981},
     doi = {10.21136/AM.1981.103918},
     mrnumber = {0623507},
     zbl = {0468.49005},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/AM.1981.103918/}
}