title: Four cycloalkanespiro-4'-imidazolidine-2',5'-dithiones.
authors.affiliation: Bulgarian Academy of Sciences, CL of Mineralogy and Crystallography, Acad G. Bonchev Str. build. 107, 1113 Sofia, Bulgaria.
authors.forename: Boris
authors.initials: B
authors.lastname: Shivachev
authors.forename: Rosica
authors.initials: R
authors.lastname: Petrova
authors.forename: Petja
authors.initials: P
authors.lastname: Marinova
authors.forename: Neyko
authors.initials: N
authors.lastname: Stoyanov
authors.forename: Anife
authors.initials: A
authors.lastname: Ahmedova
authors.forename: Mariana
authors.initials: M
authors.lastname: Mitewa