[1] Breckel, T. P. K., Gießing, C., Gieseler, A., Querbach, S., Reuter, M., and Thiel, C. M., “Nicotinergic Modulation of Attention-Related Neural Activity Differentiates Polymorphisms of DRD2 and CHRNA4 Receptor Genes”, PLoS ONE, vol. 10, no. 6. Public Library of Science (PLoS), p. e0126460, 16-Jun.-2015.