- https://en.wikipedia.org/wiki/Ligation_(molecular_biology)
- http://vlab.amrita.edu/?sub=3&brch=186&sim=781&cnt=1
- https://en.wikipedia.org/wiki/DNA_ligase
- http://stanxterm.aecom.yu.edu/wiki/index.php?page=Ligation_of_oligonucleotides
- https://www.genelink.com/geneprodsite/category.asp?c=46
- http://www.discoverbiotech.com/wiki/-/wiki/Main/DNA+Ligation+and+Transformation
- https://en.wikipediahttp://blog.addgene.org/plasmids-101-blue-white-screening.org/wiki/Multiple_cloning_site
- https://en.wikipedia.org/wiki/Selectable_marker
- http://www.tutorvista.com/content/biology/biology-iii/biotechnology/gene-cloning.php
- http://www.cellprojects.com/bacterial_application.htm
- http://wolfson.huji.ac.il/expression/procedures/bacterial/competent_cells%20_guide_v3.pdf
- https://www.neb.com/~/media/NebUs/Page%20Images/Applications/Cloning%20and%20Mapping/CloningTimeline.pdf
- http://www.biologyreference.com/Dn-Ep/Electrophoresis.html