Features of advance regeneration of economically valuable species under the canopy of natural oak stands in fresh and moist maple-lime fairly fertile oak forest type in the Left-bank Forest-Steppe part of the Sumy region - M. H. Rumiantsev; V. A. Lukianets; V. P. Samodai; V. A. Ihnatenko; A. V. Sotnikova; Ye. Trofymenko (Forestry and Forest Melioration, 2018)