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Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)|January 1, 1989
Developmental biology in space: why and how?G A UbbelsCellular and Molecular Life Sciences : CMLS|April 1, 1997
Establishment of polarities in the oocyte of Xenopus laevis: the provisional axial symmetry of the full-grown oocyte of Xenopus laevisG A UbbelsAdvances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)|January 1, 1992
Developmental biology on unmanned space craftG A UbbelsFolia Histochemica Et Cytobiologica|January 1, 1997
Dynamic changes in the tubulin cytoskeleton during oogenesis and early development in the anuran amphibian Xenopus laevis (Daudin)J Palecek, G A UbbelsJournal of Embryology and Experimental Morphology|June 1, 1979
The ultrastructure of the dorsal yolk-free cytoplasm and the immediately surrounding cytoplasm in the symmetrized egg of Xenopus laevisJ Herkovits, G A UbbelsWilhelm Roux' Archiv Fur Entwicklungsmechanik Der Organismen|March 18, 2017
The formation of the mesoderm in urodelean amphibians : IV. Qualitative evidence for the purely "ectodermal" origin of the entire mesoderm and of the pharyngeal endodermP D Nieuwkoop, G A UbbelsAdvances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)|January 1, 1984
Cytoskeleton and gravity at work in the establishment of dorso-ventral polarity in the egg of Xenopus laevisG A Ubbels, T G BromJournal of Embryology and Experimental Morphology|June 1, 1978
Changes of the external and internal pigment pattern upon fertilization in the egg of Xenopus laevisJ Palecek, G A Ubbels, K RzehakHistochemistry|January 1, 1982
An immunocytochemical method for the visualization of tubulin-containing structures in the egg of Xenopus laevisJ Palecek, G A Ubbels, J MáchaAdvances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)|January 1, 1989
Fertilization of frog eggs on a Sounding Rocket in spaceG A Ubbels, W Berendsen, J NarrawayPageof 2