Smallholder rubber agroforestry farming in the non-traditional areas of Sri Lanka: An application of assets-based livelihood capital indicator approachJ.K.S. Sankalpa, W. Wijesuriya, P.G.N. Ishani and A.M.R.W.S.D. RathnayakaE3S Web Conf., 305 (2021) 06002DOI: https://doi.org/10.1051/e3sconf/202130506002