The intrinsic Baldwin effect in broad Balmer lines of six long-term monitored AGNs N. Rakić, G. La Mura, D. Ilić, A. I. Shapovalova, W. Kollatschny, P. Rafanelli and L. Č. Popović A&A, 603 (2017) A49 Published online: 06 July 2017 DOI: 10.1051/0004-6361/201630085