@article {Lefeld1986,
	title = {Upper Jurassic-Lowermost Cretaceous sequences in the Inner Carpathians (Poland) and in the Balkanids (Bulgaria) {\textendash} a comparison},
	journal = {Geologica Balcanica},
	volume = {16},
	year = {1986},
	pages = {87{\textendash}97},
	keywords = {JS, TIP},
	author = {Lefeld, Jerzy and Sapunov, I and Tchoumatchenco, P and Bakalova, D and Dodekova, L}
}
