PMC:1624833 / 11099-11240 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/1624833","sourcedb":"PMC","sourceid":"1624833","source_url":"https://www.ncbi.nlm.nih.gov/pmc/1624833","text":"1. ℛ is the ordered list of rows of L with the property that each element of ℛ is an element of R; a row in R can appear multiple times in ℛ.","tracks":[]}