Robuta

https://en.wikipedia.org/wiki/Heterotic_string_theory
heterotic string theorywikipedia
https://arxiv.org/abs/hep-th/9510209
Abstract page for arXiv paper hep-th/9510209: Heterotic and Type I String Dynamics from Eleven Dimensions
type i stringhepthheteroticdynamics
https://www.arxiv.org/abs/2106.03886
Abstract page for arXiv paper 2106.03886: Non-Perturbative Heterotic Duals of M-Theory on $G_{2}$ Orbifolds
m theorynonperturbativeheteroticduals