	Authors	Year	Title
	Kulagina, Pazukhin & Nikolaeva	2009	Serpukhovian and Bashkirian Bioherm Fazies of the Kizil Formation in the South Urals. E.I.Kulagina, V.N.Pazukhin, S.V.Nikolaeva,N.N.Kochetowa,G.F.Zainakaeva,B.Gibshman & V.A.Konovalova. Proceedings Intern.Scientific Conference Ufa-Sibai, 2009: 78-96, 6 fig., 3 pl., Ufa,
	Nikolaeva, Kulagina & Pazukhin	2005	Advances in understanding of the Viséan-Serpukhovian boundary in the South Urals and its correlation. Newsletter on Carboniferous Stratigraphy, 23: 27-30.
	Nikolaeva, Kulagina & Pazukhin	2009	Paleontology and Microfacies of the Serpukhovian in the Verkhnyaya Kardailovka Section, South Urals, Russia: potential candidate for the GSSP for the Viséan-Serpukhovian boundary.(S.V.Nikolaeva, et al., for full authors see Note. Newsletters on Stratigrahy, 43/2: 165-193, 8 fig.,3 pl., Berlin, Stuttgart.