The issue of forming a working group was neither raised during the talks between the Turkish Foreign Ministry and the Russian authorities in Ankara, nor during the contacts between the military authorities of both countries.
http://www.mfa.gov.tr/qa_24_-7-october-2015_-statement-of-the-spokesperson-of-the-ministry-of-foreign-affairs_-tanju-bilgi%C3%A7_-in-response-to-a-question-regarding-the-negotiations-held-with-russia-on-the-prevention-of-turkish-airspace-violations.en.mfa
http://www.mfa.gov.tr/qa_24_-7-october-2015_-statement-of-the-spokesperson-of-the-ministry-of-foreign-affairs_-tanju-bilgi%C3%A7_-in-response-to-a-question-regarding-the-negotiations-held-with-russia-on-the-prevention-of-turkish-airspace-violations.en.mfa