Question regarding past papers


I stumbled upon a reference to an old paper from 2014:
Yukinori Iwashita - Tree Option Pricing Models

It appears that quantitative research papers are no longer hosted on the opengamma site.

Could someone kindly direct me to a link of the pdf? Thank you so much!

As many of the quant research papers had suffered link rot, we’ve gathered them together on a new page:
Unfortunately, the particular one you mention isn’t one I’ve managed to find yet.

Found it!

Thank you very much!