Search for photospheric footpoints of quiet Sun transition region loops J. Sánchez Almeida, L. Teriaca, P. Sütterlin, D. Spadaro, U. Schühle and R. J. Rutten A&A, 475 3 (2007) 1101-1109 Published online: 24 September 2007 DOI: 10.1051/0004-6361:20078124