@article{PIM_1962_N_S_02_16_a12,
     author = {Svetozar Kurepa},
     title = {On {The} {Functional} {Equation:} {T1(t+s)} {T2(t-s)} = {T3(t)} {T4(s)}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {99 },
     publisher = {mathdoc},
     volume = {_N_S_02},
     number = {16},
     year = {1962},
     url = {http://geodesic.mathdoc.fr/item/PIM_1962_N_S_02_16_a12/}
}