Chuiko, S., and O. V. Nesmelova. “On the Reduction of a Nonlinear Noetherian Differential-Algebraic Boundary-Value Problem to a Noncritical Case”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics, Vol. 90, Dec. 2019, pp. 60-72, doi:10.26565/2221-5646-2019-90-04.