@article{PDA_1989_17_a0,
     author = {D. Djurovi\'c},
     title = {Pseudo-Harmonic {Signal} {Variations} {Generated} by {Labrouste} {Transforms} of the {Class} $\Pi (T)$},
     journal = {Publications of the Department of Astronomy},
     pages = {5 },
     publisher = {mathdoc},
     volume = {17},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PDA_1989_17_a0/}
}