TAB I think if he takes info from Krokhmalyuk it is best to say something like Subtelny cites Krokhmalyuk saying that precisely because Krokhmalyuk is a tricky source as discussed above Also if we cite Subtelny citing Krokhmaluk we should not list Khorkhmaluk in a reference until we see this book ourselves Until then the ref should say Krokhamlyuk book name cited through Subtelny Irpen