Higa, Kelly C.; Callahan, Sean M. (1 August 2010). ”Ectopic expression of hetP can partially bypass the need for hetR in heterocyst differentiation by Anabaena sp. strain PCC 7120” (på engelska). Molecular Microbiology 77 (3): sid. 562–574. doi:10.1111/j.1365-2958.2010.07257.x. ISSN1365-2958. PMID 20545862.
van Hove, C.; Lejeune, A. (2002). ”The Azolla: Anabaena Symbiosis”. Biology and Environment: Proceedings of the Royal Irish Academy 102B (1): sid. 23–26. doi:10.1353/bae.2002.0036.
Vaishampayan, A.; Sinha, R. P.; Häder, D.-P.; Dey, T.; Gupta, A. K.; Bhan, U.; Rao, A. L. (2001). ”Cyanobacterial Biofertilizers in Rice Agriculture”. Botanical Review 67 (4): sid. 453–516. doi:10.1007/bf02857893.
Singh, S.; Prasad, R.; Singh, B. V.; Goyal, S. K.; Sharma, S. N. (1990-06-01). ”Effect of green manuring, blue-green algae and neem-cake-coated urea on wetland rice (Oryza sativa L.)” (på engelska). Biology and Fertility of Soils 9 (3): sid. 235–238. doi:10.1007/bf00336232. ISSN0178-2762.
Bennicelli, R.; Stępniewska, Z.; Banach, A.; Szajnocha, K.; Ostrowski, J. (2004-04-01). ”The ability of Azolla caroliniana to remove heavy metals (Hg(II), Cr(III), Cr(VI)) from municipal waste water”. Chemosphere 55 (1): sid. 141–146. doi:10.1016/j.chemosphere.2003.11.015. PMID 14720557. Bibcode: 2004Chmsp..55..141B.
Pan, Changchun; Hu, Nan; Ding, Dexin; Hu, Jinsong; Li, Guangyue; Wang, Yongdong (2016-01-01). ”An experimental study on the synergistic effects between Azolla and Anabaena in removal of uranium from solutions by Azolla–anabaena symbiotic system” (på engelska). Journal of Radioanalytical and Nuclear Chemistry 307 (1): sid. 385–394. doi:10.1007/s10967-015-4161-y. ISSN0236-5731.
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Bennicelli, R.; Stępniewska, Z.; Banach, A.; Szajnocha, K.; Ostrowski, J. (2004-04-01). ”The ability of Azolla caroliniana to remove heavy metals (Hg(II), Cr(III), Cr(VI)) from municipal waste water”. Chemosphere 55 (1): sid. 141–146. doi:10.1016/j.chemosphere.2003.11.015. PMID 14720557. Bibcode: 2004Chmsp..55..141B.
Higa, Kelly C.; Callahan, Sean M. (1 August 2010). ”Ectopic expression of hetP can partially bypass the need for hetR in heterocyst differentiation by Anabaena sp. strain PCC 7120” (på engelska). Molecular Microbiology 77 (3): sid. 562–574. doi:10.1111/j.1365-2958.2010.07257.x. ISSN1365-2958. PMID 20545862.
Higa, Kelly C.; Callahan, Sean M. (1 August 2010). ”Ectopic expression of hetP can partially bypass the need for hetR in heterocyst differentiation by Anabaena sp. strain PCC 7120” (på engelska). Molecular Microbiology 77 (3): sid. 562–574. doi:10.1111/j.1365-2958.2010.07257.x. ISSN1365-2958. PMID 20545862.
Singh, S.; Prasad, R.; Singh, B. V.; Goyal, S. K.; Sharma, S. N. (1990-06-01). ”Effect of green manuring, blue-green algae and neem-cake-coated urea on wetland rice (Oryza sativa L.)” (på engelska). Biology and Fertility of Soils 9 (3): sid. 235–238. doi:10.1007/bf00336232. ISSN0178-2762.
Pan, Changchun; Hu, Nan; Ding, Dexin; Hu, Jinsong; Li, Guangyue; Wang, Yongdong (2016-01-01). ”An experimental study on the synergistic effects between Azolla and Anabaena in removal of uranium from solutions by Azolla–anabaena symbiotic system” (på engelska). Journal of Radioanalytical and Nuclear Chemistry 307 (1): sid. 385–394. doi:10.1007/s10967-015-4161-y. ISSN0236-5731.