[1] Obafemi Awolowo Univ, Fac Environm Design & Management, Dept Estate Management, Ife, Nigeria
[2] Univ Free State, Dept Quant Surveying & Construct Management, Bloemfontein, South Africa
[3] Obafemi Awolowo Univ, Fac Environm Design & Management, Dept Quant Surveying, Ife, Nigeria
[4] Univ Free State, Fac Nat & Agr Sci Main Campus, Dept Quant Surveying & Construct Management, Bloemfontein, South Africa