Elităt i promenite v Bălgarija. Analiz na rezultatite ot sociologičesko izsledvane (Centăr za izsledvane na demokracijata, 1997)
The analysis of the attitude of the elite towards the non-profit organizations is based on a national sociological survey carried out in early 1997 by Vitosha Research. The survey sample includes 421 representatives of the elite. The survey method is a standardized personal interview