@phdthesis{Koytcheva2006,
author = {Koytcheva, E.},
title= {Social-demographic differences of fertility and union formation in Bulgaria before and after the start of the societal transition},
year = {2006},
type = {Ph.D. thesis},
address = {Rostock},
publisher = {Universität Rostock, Sozialwissenschaftliche Fakultät},
}