1. Diffuse radiation and cloud fraction relationships in two contrasting amazonian rainforest sites;Butt;Agric. Forest Meteorol.,2010
2. ISO/IEC guide 98-3, 2008. Uncertainty of measurement – Part 3: Guide to the expression of uncertainty in measurement (gum:1995).
3. ISO 9059, 1990. Solar energy – calibration of field pyrheliometers by comparison to a reference pyrheliometer.
4. ISO 9060, 1990. Solar energy – specification and classification of instruments for measuring hemispherical solar and direct solar radiation.
5. ISO 9806, 2013. Solar energy – test method for solar collectors – Part 1: Thermal performance of glazed liquid heating collectors including pressure drop.