@article{PIM_1974_N_S_17_31_a14,
     author = {Ioan Pop},
     title = {On unsteady three-dimensional boundary layer},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {127 },
     publisher = {mathdoc},
     volume = {_N_S_17},
     number = {31},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/PIM_1974_N_S_17_31_a14/}
}