Multiple terms: term1 term2 red apples returns results with all terms like: Fructose levels in red and green apples
Precise match in quotes: "term1 term2" "red apples" returns results matching exactly like: Anthocyanin biosynthesis in red apples
Exclude a term with -: term1 -term2 apples -red returns results containing apples but not red: Malic acid in green apples
https://doi.org/10.5194/we-17-29-2017-supplement
Genetic diversity in the alpine flatworm Crenobia alpina National Center for Biotechnology Information https://www.ncbi.nlm.nih.gov/