document.write("«&nbsp;<a href='/news/view?id=60307'>A note on the relativistic spherical $\delta$-shell interaction in $\mathbb{R}^3$: spectrum and approximation. (arXiv:1704.07605v1 [math.AP])</a>");document.write(" | ");document.write("<a href='/news/view?id=60309'>A practitioner’s guide to hedonism (2007)</a>&nbsp;»");