@article{10_4064_ap_54_1_45_57,
     author = {H. Renelt},
     title = {An integral formula for the derivatives of solutions of certain elliptic systems},
     journal = {Annales Polonici Mathematici},
     pages = {45--57},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {1991},
     doi = {10.4064/ap-54-1-45-57},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-54-1-45-57/}
}