@article{ND_2011_7_3_a18,
     author = {V. V. Meleshko},
     title = {Hassan {Aref} (1950-2011)},
     journal = {Russian journal of nonlinear dynamics},
     pages = {691--713},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2011_7_3_a18/}
}