AUTHOR=Takahashi Kazunori , Charles Christine , Boswell Rod W. , Takao Yoshinori , Fruchtman Amnon , Navarro-Cavallé Jaume , Merino Mario 

TITLE=Commentary: On helicon thrusters: Will they ever fly?

JOURNAL=Frontiers in Physics

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.00277

DOI=10.3389/fphy.2020.00277

ISSN=2296-424X