1. Abetti A (1876) Teoria e pratica della costruzione di un orologio solare in piano verticale. Braumüller, Vienna
2. Alados I, Foyo-Moreno I, Alados-Arboledas L (2012) Estimation of downwelling longwave irradiance under all-sky conditions. Int J Climatol 32:781–793
3. Allen RG, Pereira LS, Raes D, Smith M (1998) Crop evapotranspiration - guidelines for computing crop water requirements - FAO Irrigation and Drainage paper 56, FAO - Food and Agriculture Organization of the United Nations. http://www.fao.org/3/x0490e/x0490e00.htm. Accessed 20 September 2020
4. Andrighetti M, Zardi D, de Franceschi M (2009) History and analysis of the temperature series of Verona (1769–2006). Meteorog Atmos Phys 103:267–277
5. Arago F (1858) Sur l’état thermométrique du Globe Terrestre. In: Barral JA (ed) Oeuvres. Notices Scientifiques. Tome V. Gide et Baudry, Paris, pp 184–636