The software prints:
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.
That sounds to me like cite or you will be taken to court for not citing.
If I cite parallel, should I cite Perl? C library? Linux kernel? Systemd?
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.
That sounds to me like cite or you will be taken to court for not citing.
If I cite parallel, should I cite Perl? C library? Linux kernel? Systemd?
Examples of the latter are e.g. Linux, libc, systemd etc.: All things used during production of the results, but not aimed at producing such results. The former are e.g. Matlab, the Intel MKL, ALPS, TensorFlow or similar tools and suites. A bug in the MKL may make your results wrong, while a but in the kernel will most likely just crash everything. In my experience, scientific results depend on a handful of software packets in such a way, and adding five-or-so citations to a paper is certainly no big deal and would make reproducing the results much easier.
I have no idea where GNU parallel sits there, it probably depends on how you use it – do you schedule your Monte Carlo runs with it or just rescale pictures for the website? Admittedly, it is a very grey area, but I don’t consider a request for citation unreasonable.