@article{ Solr-1523134623, title = {The problem of dating early Qur’āns}, journal = {Der Islam} number = {3} pages = {213-231} volume = {33} author = {Grohmann, Adolf}, publisher = {De Gruyter}, year = {1958}, url = {http://dx.doi.org/10.1515/islm.1958.33.3.213} }