@article{AFM_1971_471-500_a10,
     author = {Julian Lawrynowicz and Olli Tammi},
     title = {On estimating of a fourth order functional for bounded univalent functions},
     journal = {Annales Fennici Mathematici},
     year = {1971},
     volume = {471-500},
     doi = {10.5186/aasfm.1971.490},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1971.490/}
}