@article{CG_2011___56_182_0,
     author = {Hagen, Hans},
     title = {MkIV hybrid technology},
     journal = {Cahiers GUTenberg},
     pages = {182--300},
     publisher = {Association GUTenberg},
     number = {56},
     year = {2011},
     language = {en},
     url = {http://archive.numdam.org/item/CG_2011___56_182_0/}
}