@article{Lehenkyi_2004
author = {Victor I. Lehenkyi},
title = {Theoretic-Group Criterion for Reduction of the Equation G(t, x, x',...) + εF(t, x, x',...)= 0 to the Form G(t^, x^, x^´,...) = 0},
journal = {Journal of Automation and Information Sciences},
issn = {1064-2315},
year = {2004},
volume = {36},
number = {4},
pages = {18--25}
}