Fix link to Strassmeier et al. 2005 reference

Author: migueldvb

tutorials/UVES/UVES.ipynb

@@ -107,8 +107,8 @@
       "Taurus-Auriga star forming region located at a distance of about 140 pc. MN Lup\n",
       "has been observed simultaneously with XMM-Newton and the UVES spectrograph on the\n",
       "VLT. MN Lup is suspected to be a classical T Tauri star, that is accreting mass\n",
-      "from a circumstellar disk. MN Lup has been Doppler imaged by `Strassmeier et al.\n",
-      "(2005, A&A, 440, 1105) <http://adsabs.harvard.edu/abs/2005A%26A...440.1105S>`_\n",
+      "from a circumstellar disk. MN Lup has been Doppler imaged by\n",
+      "[Strassmeier et al. 2005](http://adsabs.harvard.edu/abs/2005A%26A...440.1105S)\n",
       "with a very similar UVES setup and those authors claim an rotationally modulated\n",
       "accretion spot.\n",
       "\n",