While there isn't a single "standard" academic paper with that exact title, the concept of a portable annual tithi calculator

8. Recommendations

For a practical and reliable Annual Tithi Calculator Portable, the following is recommended:

How to Use Annual Tithi Calculator Portable

There are 30 tithis in a lunar month (15 in the Shukla Paksha – waxing phase, and 15 in the Krishna Paksha – waning phase). These include: