What is a cell?Arkivert 18. januar 2006 hos Wayback Machine. Arkivert 2006-01-18 hos Wayback Machine 2004. A Science Primer: A Basic Introduction to the Science Underlying NCBI Resources. NCBI; and Campbell, Neil A.; Reece, Jane B.; Biology Benjamin Cummings, Pearson Education 2002.
Patrick K. Schoff (25. november 2005). «Cleavage»(PDF). Developmental Biology Biology 4361. University of Minnesota Duluth. Besøkt 26. november 2014.
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What is a cell?Arkivert 18. januar 2006 hos Wayback Machine. Arkivert 2006-01-18 hos Wayback Machine 2004. A Science Primer: A Basic Introduction to the Science Underlying NCBI Resources. NCBI; and Campbell, Neil A.; Reece, Jane B.; Biology Benjamin Cummings, Pearson Education 2002.