@article{SJC_2018_12_4_a2,
     author = {Dimitrov, Vladimir},
     title = {Codd{\textquoteright}s {Recommendations} for {Date} & {Time} {Data} {Types} and its implementations in {ISO} {SQL,} {DB2,} {Oracle,} and {Transact-SQL}},
     journal = {Serdica Journal of Computing},
     pages = {247--264},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SJC_2018_12_4_a2/}
}