@article{MAN_1970__186_161977,
     author = {P.E. SCHUPP},
     title = {On the {Conjugacy} {Problem} for {Certain} {Quotient} {Groups} of {Free} {Products.}},
     journal = {Mathematische Annalen},
     pages = {123--129},
     publisher = {mathdoc},
     volume = {186},
     year = {1970},
     zbl = {0182.03504},
     url = {http://geodesic.mathdoc.fr/item/MAN_1970__186_161977/}
}