MathSciNet bibliographic data

MR1834843 (2002e:16010) 16D90 (16E30) Angeleri Hügel, Lidia; Tonolo, Alberto; Trlifaj, Jan Tilting preenvelopes and cotilting precovers. Algebr. Represent. Theory 4 (2001), no. 2, 155--170.

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