Venus surface temp correctly predicted from lapse rate in 1967 – but is it the whole story?

I came across this paper today while searching for the heat capacity of Venus near surface atmosphere, which is actually an ocean-like (in thermodynamic terms) supercritical fluid. It presages Harry Dale Huffman’s ‘rediscovery’ of the lapse rate calculation by four decades. Another paper, much more recent, (Bolmatov et al 2013) contains some theory which raises yet more questions about the reasons for Venus’ high surface temperature. So, greenhouse due to radiative proerties of co2 as Sagan claimed, lapse rate due to gravity and pressure as Nikolov and Zeller maintain, or the thermal properties of supercritical fluids and geothermal energy having a hard time escaping the lower atmosphere? Let the debate recommence!