1. Adekunle VAJ, Olagoke AO, Ogundare LF (2013) Logging impacts in tropical lowland humid forest on tree species diversity and environmental conservation. Appl Ecol Environ Res 11(3):491–511
2. Aigbe HI, Akindele SO, Onyekwelu JC (2013) Volume equations for Oban tropical Forest Reserve, Cross River State, Nigeria. Niger J For 43(1):53–67
3. Amiri M, Naghdi R (2016) Assessment of competition indices of an unlogged oriental beech mixed stand in Hyrcanian forests, Northern Iran. Biodiversitas J Biol Divers 17(1):306–314
4. Ariyo OC, Oluwalana SA, Faleyimu OI, Ariyo MO (2012) Assessment of vegetation structural diversity and similarity index of IITA forest reserve in Ibadan, Oyo State Nigeria. Agrosearch 12(2):136–158
5. Biging GS, Dobbertin M (1992) A comparison of distance-dependent competition measures for height and basal area growth of individual conifer trees. For Sci 38(3):695–720