Citations are different, for instance I'm a research bioinformatician writing a paper about the issues you face storing billions of genotypes in an SQL database

Citations are different, for instance I'm a research bioinformatician writing a paper about the issues you face storing billions of genotypes in an SQL database. I'm going to cite Codd 1970 but I learned SQL from web tutorials written 30 years after the paper, which I've only skimmed.