Name of the reference style

Can anyone tell me the name of the following reference style:

In text: [BAL 05] 

Bibliography: [BAL 05] BALANIS C., Antenna Theory: Analysis and Design, Wiley, 2005.

I often think of this as a “German” required style, so I searched the forum for that.  This is not something that Endnote can automate and there are some threads about creating a label and some output templates.  




and then a complicated way to perhaps generate the labels, but not sure this ever got resolved: 

I am sure it has been discussed in other threads… 

j’aime bien ce style allemand