Absolut brightness of comet Ikya-Seki 1965 f and of other comets of Kreutz's group Jiří Bouška (1966) Acta Universitatis Carolinae. Mathematica et Physica Similarity:
Life-time of C 2 and CN molecules and solid grains in cometary atmospheres Vladimír Vanýsek (1965) Acta Universitatis Carolinae. Mathematica et Physica Similarity:
The estimation of the dust content in the atmosphere of comet West 1975n Martin Šolc, Vladimír Vanýsek, Jan Svatoš, Pham Tien Duc (1981) Acta Universitatis Carolinae. Mathematica et Physica Similarity: