1. Barlow, P. W., Rost, T. L., Gunning, B. E. S., 1982: Nuclear and cytoplasmic changes during early stages of cell differentiation in roots of the water-fern,Azolla pinnata. Protoplasma112, 205?216.
2. Gertel, E. T., Green, P. B., 1977: Cell growth pattern and wall microfibrillar arrangement: Experiments withNitella. Plant Physiol.60, 247?254.
3. Gunning, B. E. S., 1980: Spatial and temporal regulation of nucleating sites for arrays of cortical microtubules in root tip cells of the water fernAzolla pinnata. Eur. J. Cell Biol.23, 53?65.
4. ?, 1982: The root of the water fernAzolla: cellular basis of development and multiple roles for cortical microtubules. Symp. Soc. Dev. Biol. 40(Subtelney, S., ed.). NewYork: A. R. Liss Inc.
5. ?,Hardham, A. R., 1982: Microtubules. Ann. Rev. Plant Phys.33, 651?698.