I'm searching for a citation style. Im using biblatex and I want the following citation using the first letters of the last name and the year of publishing:
For only one author the referance should consider the first three letters and the year like: [Lot08] for the name Loth and the year 2008.
For more than one auther the referance should look like this [BMCW12] which contains the first letters of the lastname of the authors (Becker, Meier, Conrady, Wolf) and the year. I know this is very similar to the alphabetic style but I don't want to get the plus inside the cite like [BMC+12]. In addition I want to fix the number of letters to 4 even if there are more authors.
Is there such a citation style available or do I have to adjust the alphabetic style??