Last supper and institution narratives
The Didache
Other early Christian ritual meals
Justin Martyr
Eucharistic theology from Ignatius to Tertullian
The Eucharist in the third century
The evolution of Eucharistic prayers
The transformation of the Eucharist in the fourth century.
Eucharistic origins by Paul F. Bradshaw. ISBN 0281056153. Published by SPCK in 2004. Publication and catalogue information, links to buy online and reader comments.