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2. Kvaalen H. Virking av forskjellig stubbehoyde pa skuddskyting, stubbeoverlevelse og vekst av stubbeskudd etter hogst av seks år gammel henge bjørk (Betula pendula Roth). Summary: the effect of different stump heights on sprouting, stump survival and sprout growth, after cutting of six year old white birch (Betula pendula Roth). Research paper, no. 5. Norwegian: Norwegian Forest Institute; 1989. p. 1–11.
3. Johansson T. The effect of stump height and cut surface type on stump survival, sprouting and sprout growth of 10–35-year old Betula pubescens Ehrh. Report no. 28. Department of Forest Yield, Swedish University of Agricultural Sciences, 1991. p. 1–19.
4. Sprouting of 2- to 5-year-old birches (Betula pubescens Ehrh. and Betula pendula Roth) in relation to stump height and felling time;Johansson;Forest Ecology and Management,1992
5. Dormant buds on Betula pubescens and Betula pendula stumps under different field conditions;Johansson;Forest Ecology and Management,1992