Clay minerals and clinoptilolite from the Variegated Shales Formation in the Skole Unit, Polish Flysch Carpathians / W. FRANUS, K. DUDEK // Geologica Carpathica ; ISSN 1335-0552. — 1999 vol. 50 spec. iss., s. 23–24. — Bibliogr. s. 24. — Numer ISSN w bazie Web of Science: 0016-7738. — Carpathian Geology 2000 : international geological conference : October 11–14, 1999, Smolenice, Slovak Republic. — Bratislava : Slovak Academic Press, [1999]