Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Alan H. Christensen and Robert A. Sharrock and Peter H. Quail,"Maize polyubiquitin genes: structure, thermal perturbation of expression and transcript splicing, and promoter activity following transfer to protoplasts by electroporation",Plant Molecular Biology,0167-4412,Springer Science and Business Media LLC,1992-02,18,4,675-689,https://cir.nii.ac.jp/crid/1362544419736430720,https://doi.org/10.1007/bf00020010