1. Behnia, M.; de Vahl Davis, G.; Stella, F.; Guj, G. 1990: A comparison of velocity-vorticity and stream function vorticity formulations for Pr = 0. Notes on Num. Fluid Mech. GAMM Workshop 27, 19–24
2. Carlomagno, G. M. 1986: Metodi ottici quantitavi nella diffusione di massa e di energia. UIT Atti del 4° Congresso nazionale sulla trasmissione del calore, June 5–7, Genova, Italy
3. Chakrabarti, S.; Probert, S. D.; Shilton, M. J. 1983: Optimal eccentrical annuli (containing atmospheric-pressure air) for thermally insulating, horizontal, relatively cold pipes. Appl. Energy, 14, 257–293
4. Cho, C. H.; Chang, K. S.; Park, K. H. 1982: Numerical simulation of natural convection in concentric and eccentric horizontal cylindrical annuli. J. Heat Transfer 104, 624–630
5. Grigull, U.; Hauf, W. 1966: Natural convection in horizontal cylindrical annuli. Proc. of the 3rd Heat Transfer Conf. Chicago, Paper 60, 182–195