API-Server does answer, but with an error-message:
500 Internal Server Error – Check the API, this error happens at the API server
opensearch:totalResults =
opensearch:startIndex =
opensearch:itemsPerPage =
@role = {search-results.opensearch:Query.@role}
@searchTerms = {search-results.opensearch:Query.@searchTerms}
@startPage = {search-results.opensearch:Query.@startPage}

@_fa = {search-results.link.@_fa}
@ref = {search-results.link.@ref}
@href = {search-results.link.@href}
@type = {search-results.link.@type}


inizio

@_fa = {search-results.entry.@_fa}

@_fa = {search-results.entry.link.@_fa}
@ref = {search-results.entry.link.@ref}
@href = {search-results.entry.link.@href}

; ; ; DOI:
prism:url =
dc:identifier =
eid =
dc:creator =
prism:publicationName =
prism:issn =
prism:eIssn =
prism:volume =
prism:issueIdentifier =
prism:pageRange =
prism:coverDate =
prism:coverDisplayDate =
prism:doi =
citedby-count =

@_fa = {search-results.entry.affiliation.@_fa}
affilname =
affiliation-city =
affiliation-country =

pubmed-id =
prism:aggregationType =
subtype =
subtypeDescription =
article-number =
source-id =
openaccess =
openaccessFlag =
value:

$ =

value:

$ =

prism:isbn:

@_fa = {search-results.entry.prism:isbn.@_fa}
$ =

pii =