Were there any researches done that include Slovenes? There isn't much talk about genetics here but I'm kinda interested in it but have no clue where to find such data …

No idea! Most studies on Autosomal DNA I came across were published in the last 3-4 years. If there is no specific study on Slovene population, then maybe Slovenes are included in wide European studies. The keywords are Genomewide/Genome-wide analysis or Autosomal DNA analysis.