While there are no academic "useful papers" or scholarly journals written specifically about the 2015 edition, you can access the historical data or digital copies through the following resources:

The 2015 edition followed the traditional , where months begin on the full moon (Purnima). It meticulously detailed the five limbs of the Panchang: Tithi (lunar day), Vara (weekday), Nakshatra (constellation), Yoga , and Karana . Key Festivals and Dates in 2015