@article{PIM_1975_N_S_18_32_a9,
     author = {Jovan D. Ke\v{c}ki\'c},
     title = {Notes {On} {Partial} {Differential} {Equations} {III:} {Two} {Dirchlet} {Type} {Problems} {For} {Poisson's} {Equation}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {99 },
     publisher = {mathdoc},
     volume = {_N_S_18},
     number = {32},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/PIM_1975_N_S_18_32_a9/}
}