@article{10_4064_ap_46_1_333_360,
     author = {Zofia Szmydt and Bogdan Ziemian},
     title = {An invariance method for constructing fundamental solutions for $P(\ensuremath{\square}_mn)$},
     journal = {Annales Polonici Mathematici},
     pages = {333--360},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1985},
     doi = {10.4064/ap-46-1-333-360},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-46-1-333-360/}
}