Detecting photons with orbital angular momentum in extended astronomical objects: application to solar observationsN. Uribe-Patarroyo, A. Alvarez-Herrero, A. López Ariste, A. Asensio Ramos, T. Belenguer, R. Manso Sainz, C. LeMen and B. GellyA&A, 526 (2011) A56DOI: https://doi.org/10.1051/0004-6361/201014844
