1. Total carbon;Allison,1965
2. Essays in Biosynthesis and Microbial Development;Bulock,1967
3. The phenolic constituents of humic acids and their relation to the lignin of the plant cover;Burges;Geochim. cosmochim. Acta,1964
4. Development of microorganisms and humus substance formation in media with different content of bentonite;Filip;Pochvovedeniya (Moscow),1968
5. Characteristics of humic substances in a soil incubated with additions of bentonite;Filip;Rostlinna vyroba (Prague),1969