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.  

Here: https://community.endnote.com/t5/EndNote-Styles-Filters-and/Bibliography-Template-Author-in-square-brackets/m-p/6542/highlight/true#M705

and 

Here:  https://community.endnote.com/t5/EndNote-Styles-Filters-and/Looking-for-a-style-but-I-don-t-know-it-s-name/m-p/11549#M1291

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

https://community.endnote.com/t5/EndNote-Styles-Filters-and/Style-needed-Format-Mey09/m-p/7189/highlight/true#M807 

I am sure it has been discussed in other threads… 

j’aime bien ce style allemand