@article{Daly&al1996,
	title = {Evaluating inheritance depth on the maintainability of object-oriented
	software},
	author = {J. Daly and A. Brooks and J. Miller and M. Roper and M. Wood},
	journal = {Empirical Software Engineering},
	number = {2},
	pages = {109-132},
	volume = {1},
	year = {1996},
	biburl = {http://www.bibsonomy.org/bibtex/2814a385ce69d50ab6b77b5b7a77c898b/pdeleenh},
	timestamp = {2008.05.15}, date-modified = {2007-09-26 10:37:42 +0200}, owner = {pdeleenh},
	keywords = {maintenance, object-oriented software }
}

@book{röper1954,
	title = {Wirtschaftsnachrichten in der Weltpresse},
	address = {Lehnen},
	annote = {234 S},
	author = {{Burkhardt} Röper},
	howpublished = {München},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+178591874&sourceid=fbw_bibsonomy},
	year = {1954},
	biburl = {http://www.bibsonomy.org/bibtex/28551a4fba3d10a8d74e5ed5df6fb7e65/fbw},
	description = {imported},
	isbn = {},
	keywords = {Wirtschaftsberichterstattung Wirtschaftspresse }
}

@book{röper1955,
	title = {Die vertikale Preisbindung bei Markenartikeln : Untersuchungen über Preisbildungs- und Preisbindungsvorgänge in der Wirklichkeit},
	address = {Mohr},
	annote = {VI, 194 S.},
	author = {{Burkhardt} Röper},
	howpublished = {Tübingen},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+021851891&sourceid=fbw_bibsonomy},
	year = {1955},
	biburl = {http://www.bibsonomy.org/bibtex/2326571d93466ce163118c0cb77912869/fbw},
	description = {imported},
	keywords = {Markenartikel Preisbindung }
}

@book{blume1976,
	title = {Werbung für Markenartikel : Auswirkungen auf Markttransparenz und Preise ; zwei Studien},
	address = {Schwartz},
	annote = {608 S},
	author = {{Otto} Blume and {Gislinde} Müller and {Burkhardt} Röper and {Günter} Heiduk},
	howpublished = {Göttingen},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+021933251&sourceid=fbw_bibsonomy},
	year = {1976},
	biburl = {http://www.bibsonomy.org/bibtex/26958f979139d7bfe02763cccf3155c4f/fbw},
	description = {imported},
	isbn = {3-509-00950-9},
	keywords = {imported }
}

@book{röper1976,
	title = {Gibt es geplanten Verschleiß? : Untersuchungen zur Obsoleszenzthese},
	address = {Schwartz},
	annote = {VIII, 352 S.},
	author = {{Burkhardt} Röper and {Rolf} Marfeld},
	howpublished = {Göttingen},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+027392961&sourceid=fbw_bibsonomy},
	year = {1976},
	biburl = {http://www.bibsonomy.org/bibtex/23da6ebfce88dccfcef8aedbbe401e496/fbw},
	description = {imported},
	isbn = {3-509-00953-3},
	keywords = {Obsoleszenz Produkt }
}

@book{röper1979,
	title = {Wettbewerbsprobleme der Mineralölwirtschaft im Schatten des OPEC-Kartells},
	address = {Duncker & Humblot},
	annote = {182 S},
	author = {{Burkhardt} Röper},
	howpublished = {Berlin},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+039579999&sourceid=fbw_bibsonomy},
	year = {1979},
	biburl = {http://www.bibsonomy.org/bibtex/28812a5ecc29607e3ae0ffbc598b1e8c7/fbw},
	description = {imported},
	isbn = {3-428-04313-8},
	keywords = {Erdölwirtschaft OPEC Preiskartell Preiswettbewerb }
}

@book{röper1980,
	title = {Wettbewerb in der pharmazeutischen Industrie},
	address = {Duncker & Humblot},
	annote = {188 S},
	author = {{Burkhardt} Röper},
	howpublished = {Berlin},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+020835833&sourceid=fbw_bibsonomy},
	year = {1980},
	biburl = {http://www.bibsonomy.org/bibtex/2815aebb915562107b16c2068f1bede30/fbw},
	description = {imported},
	isbn = {3-428-04597-1},
	keywords = {imported }
}

@book{[hrsg.]1987,
	title = {Wettbewerb im Medienbereich},
	address = {Duncker & Humblot},
	annote = {202 S},
	author = {{Burkhardt} Röper [Hrsg.]},
	howpublished = {Berlin},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+024090271&sourceid=fbw_bibsonomy},
	year = {1987},
	biburl = {http://www.bibsonomy.org/bibtex/239c892b4cf18b77e4976771f695d952a/fbw},
	description = {imported},
	isbn = {3-428-06126-8},
	keywords = {imported }
}

@book{röper1987,
	title = {Zur Theorie der dynamischen Preispolitik},
	address = {Gabler},
	annote = {311 S},
	author = {{Jörn W.} Röper},
	howpublished = {Wiesbaden},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+024107573&sourceid=fbw_bibsonomy},
	year = {1987},
	biburl = {http://www.bibsonomy.org/bibtex/254eecbf2583777800d1e2d23dfdd02c8/fbw},
	description = {imported},
	isbn = {3-409-13714-9},
	keywords = {imported }
}

@book{[hrsg.]1989,
	title = {Wettbewerb und Werbung},
	address = {Duncker & Humblot},
	annote = {206 S},
	author = {{Burkhardt} Röper [Hrsg.]},
	howpublished = {Berlin},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+025319027&sourceid=fbw_bibsonomy},
	year = {1989},
	biburl = {http://www.bibsonomy.org/bibtex/26066a39154b37e271054681b94b53fe2/fbw},
	description = {imported},
	isbn = {3-428-06538-7},
	keywords = {imported }
}