A telegram bot jumping in your citation database like a rabbit!
fulltext index for title and abstract is necessary for /search_by_abstract:
CREATE FULLTEXT INDEX publication_title_fulltext_index FOR (p:Publication) ON EACH [p.title];
CREATE FULLTEXT INDEX publication_abstract_fulltext_index FOR (p:Publication) ON EACH [p.abstract];For faster search, you can add text index for title:
CREATE TEXT INDEX publication_title_hash_text_index FOR (p:Publication) ON (p.title_hash);