Беззубов, Д.О. and Армаш, Н.О. 2017. On the issue of the unification of the application of substantive law on recognition of contracts null and void. Scientific works of National Aviation University. Series: Law Journal "Air and Space Law". 2, 43 (Jun. 2017), 135–139. DOI:https://doi.org/10.18372/2307-9061.43.11804.