.
Gavrilov , S. V. 2008. “Development of Technology for Construction of Sidetracks With Horizontal Sections under the Condition of Preservation of the Old Wellbore and Existing Production from It. Justification of Economic Feasibility of Drilling of Sidetracks With Horizontal Sect”. Journal of Mining Institute 174 (March), 60-62. https://pmi.spmi.ru/pmi/article/view/7483.