@article{701780,
     title = {Analysis in complex quaternions and its connections with mathematical physics},
     booktitle = {Abstracta. 9th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1981},
     pages = {168-172},
     url = {http://dml.mathdoc.fr/item/701780}
}

Souček, Vladimír. Analysis in complex quaternions and its connections with mathematical physics, dans Abstracta. 9th Winter School on Abstract Analysis, GDML_Books,  (1981), pp. 168-172. http://gdmltest.u-ga.fr/item/701780/