/** In order to link nodes between them, each one must be assigned a label,
* consisting of l integers, l being the levels number of the tree. Each label
* is unique in the level, and the way it is generated allows the construction
/** In order to link nodes between them, each one must be assigned a label,
* consisting of l integers, l being the levels number of the tree. Each label
* is unique in the level, and the way it is generated allows the construction