add a paper

README.md

@@ -313,6 +313,7 @@ Sorted alphabetically by company name and product name.
 
 - [Toward Aesthetic Guidelines for Paintings with the Aid of a Computer (1975) (PDF)](https://rednoise.org/softas/uploads/molnar.pdf) – Vera Molnar
 - [Pen Plotter as a Low-Cost Platform for Rapid Device Prototyping with Solution-Processable Nanomaterials (2023) (PDF)](https://onlinelibrary.wiley.com/doi/pdf/10.1002/adem.202300226)
+- [Preparation of V2O5 Thin Film by Sol–Gel Technique and Pen Plotter Printing](https://www.proquest.com/docview/2791602751)
 
 ## Community