When we encounter comments saying refer @ref where is the reference at ?

[Febin]

For example: /**< Value location, see @ref BLE_GATTS_VLOCS.*/

And for the love of GOD I cannot find these references anywhere !! Help Please.

[MartinBL]

Those particular references are located in ble_gatts.h. A hint is found in the name (BLE_GATTS_), but it is not a given that it is like this in all cases. The way I typically look up references like this is to do a project vide search in all files for whatever the reference is. I suppose it can be confusing that BLE_GATTS_VLOCS seems to be written in plural while the actual define is singular BLE_GATTS_VLOC_something

This is how it looks in Keil: