Pachomius, St - Concise biographical article in the 1911 Encyclopædia Britannica on the founder of the Christian cenobitical life. Some scanner errors. - http://www.1911encyclopedia.org/St_Pachomius
Catholic Online: St. Pachomius - A life of this monastic founder. - http://www.catholic.org/saints/saint.php?saint_id=800
Pachomius of Tabenna, Abbot - Longish life, with links to other saints with whom he was associated. - http://www.saintpatrickdc.org/ss/0509.htm#pach
The Ecole Glossary: Pachomius - Short biographical sketch, by Karen Rae Keck. - http://www2.evansville.edu/ecoleweb/glossary/pachomius.html
Catholic Encyclopedia: Saint Pachomius - Hermit who founded a cenobitical community, d. 346. Some speculation on how and why St. Pachomius came up with the idea of the cenobitical life. - http://www.newadvent.org/cathen/11381a.htm