@article{ZNSL_2013_420_a4,
     author = {I. A. Ibragimov and N. V. Smorodina and M. M. Faddeev},
     title = {A limit theorem on convergence of random walk functionals to a~solution of the {Cauchy} problem for the equation $\frac{\partial u}{\partial t}=\frac{\sigma^2}2\,\Delta u$ with complex~$\sigma$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {88--102},
     publisher = {mathdoc},
     volume = {420},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_420_a4/}
}