improvement on the README

README.md

@@ -24,7 +24,7 @@ Running the jar with `--help` will print its usage.
 * A CSV input file always need to be given as parameter, specified with `-f`;
 * A detection threshold can also be specified. Possible values are `default` and `spadini`. The flag is `-t`.
 By default, the tool uses the thresholds that have been originally implemented; 
-with `spadini`, sensibility thresholds published by Spadini et.al. will be used.
+with `spadini`, sensibility thresholds published by [Spadini et.al.] will be used.
 * One can specify the granularity of the detection. `boolean` will return either true or false, respectively if a 
 given smell is present or not in the test; `numerical` will return instead the number of smelly instances detected.  
 
@@ -38,4 +38,6 @@ Options:
                                    detection
   -o, --output TEXT
   -h, --help                       Show this message and exit
-```
+```
+
+[Spadini et.al.]: https://dl.acm.org/doi/abs/10.1145/3379597.3387453