Grigori is publishing a reprint of the edition (6 volumes) of the sources of Eastern Orthodox canon law by Rallis and Potlis which may be ordered at http://www.grigorisbooks.gr/TitleInfo.aspx?id=1008

This is the standard edition of the sources of Eastern Orthodox canon law, but it is not a critical edition strictly speaking and should therefore be used together with the critical (but sometimes flawed) edition of Joannou, CIC Orientalis Fontes Series I Fasc. IX (4 volumes), which can be ordered at http://www.paxbook.com/algorithmiS/servusPrimus?iussum=monstraElenchumScriptorumEditorumCat&corpus=B47

Joannou fails at times to include all the variants in his apparatus and the text ought therefore always be compared with Rallis/Potlis when critically evaluating the different readings in the grammatical interpretation of the sources.