Ulrich Stärk's empirical research (no Lisp): https://web.archive.org/web/2017/https://www.plat-forms.org/ https://web.archive.org/web/2017/https://www.plat-for

Ulrich Stärk's empirical research (no Lisp): https://web.archive.org/web/2017/https://www.plat-forms.org/ https://web.archive.org/web/2017/https://www.plat-forms.org/ It is hard enough to get study participants for the common programming languages, I deem it nigh impossible for the obscure ones.