Friedrich Robert Helmert in memory of his 100th year of death
Crossref DOI link: https://doi.org/10.1007/s13137-017-0098-3
Published Online: 2017-10-25
Published Print: 2017-11
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Witte, Bertold
License valid from 2017-10-25