On bounds and boundary conditions in the continuum Landau gauge D. Dudal, M. S. Guimaraes, I. F. Justo and S. P. Sorella Eur. Phys. J. C, 75 2 (2015) 83 Published online: 20 February 2015 DOI: 10.1140/epjc/s10052-015-3303-2