@PhdthesisMisc{P66_921, author = {Pia Pfluger}, title = {Matrizenkettenbr\"uche}, note = {Dis_no 3862, Prof. Dr. Peter Henrici}, school = {ETH Z{\"u}rich}, doi = {http://dx.doi.org/10.3929/ethz-a-000087769}, year = {1966} }