Incorrect key suffix

numapde-get-bib.sh 10.1007/s11228-016-0380-9 --merge numapde.bib (from commit f72e1b70) generates the citation key Hosseini:2016:2 instead of Hosseini:2016:1. A possible reason is an incorrect detection of the (non-existent) Hosseini:2016:1 in GrohsHosseini:2016:1.