Igor,
Any journalistic sensationalism that Kellerhof may have engaged in does not in the least excuse the completely inadmissible behaviour by Sherin.
The German retreat from Prokhorovka was occasioned by the collapse of the Axis defences in Sicily and by the Soviet offensive on the northern flank of the Orel Bulge held by Heeresgruppe Mitte, not by Soviet actions around Prokhorovka itself. Manstein was even asking Hitler for permission to conduct further offensive action, something which illustrates the magnitude of Soviet problems in this specific geographical area.
Zamulin has indeed followed up Lopukhovsky's pioneering study from 2005, but he has written very little about the operations around Orel, or indeed the wider strategic context of operations on other fronts.
The problems in the approach taken by many modern Russian historians are on display in the article "An Undoubted victory of the Red Army on the fields at Prokhorovka",
written by the popular historian Alexei Isaev on the website of the Russian Society of Military History, as a direct response to Wheatley. Isaev states that the surprise arrival of fresh Soviet reserves, namely the 5th Guards Tank Army, marked the failure of the offensive by Heeresgruppe Süd, because the German forces were unprepared for this eventuality. This is a nonsensical argument, since the surprise counter-attack on 12 July was defeated with very heavy losses. It is not at all clear why some contemporary Russian historians and officials feel the urge to react with such rhetoric to a rather straightforward review of the Germany imagery of this battlefield.
Kind regards,
Dan