@article{10_4064_ap_27_1_67_72,
     author = {J\'ozef Joachim Telega},
     title = {Covariant derivative of product tensors},
     journal = {Annales Polonici Mathematici},
     pages = {67--72},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1972},
     doi = {10.4064/ap-27-1-67-72},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-27-1-67-72/}
}