Solitons in a perturbed Korteweg-de Vries systemPeterson, Pearu; Salupere, AndrusProceedings of the Estonian Academy of Sciences. Physics. Mathematics1997 / 1/2, p. 102-110 Solitons in a perturbed Korteweg-de Vries systemPeterson, Pearu; Salupere, AndrusEuromech 348 : Nonlinear Dynamics of Heterogeneous and Microstructured Solids, May 22-26, 1996, Tallinn, Estonia : book of abstracts1996 / p. 38