@article{RM_2002_57_6_a5,
     author = {A. S. Demidov},
     title = {On the evolution of a~weak perturbation of a~circle in the problem of {a~Hele--Shaw} flow},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1212--1214},
     publisher = {mathdoc},
     volume = {57},
     number = {6},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2002_57_6_a5/}
}