Georgy A. Molkov. The history of the word пол in eighteenth-century Russian (based on the card files of The Dictionary of the Russian Language of the 18-th Century)
RJANO. 2016. № 2 (32), Pages. 115 - 142

Elena A. Galinskaya. The Declension of Cardinal Numerals in the Pskov Dialect of the 1st Half of the 17th Century
RJANO. 2011. № 2 (22), Pages. 186 - 203