Hi Leandro Oliveira,

/// <reference path=".."> 
These reference paths are used to include the respective libraries in your codes. These libraries are already present in your project file.

The "../" in the path means one folder back from the current folder, so you have to check in which folder you are adding the code file, and from that folder add "../" a number of times till you get the lib folder.
For example, if your ts file is present in "src/com/extensions/organisationapp/dev/bc/" this directory then you have to add "../" this 6 times to reach the lib directory.

Thanks & regards,
Kashinath Mali