The manuscript cited as "Fan and Kierstead [1993]" has appeared

G. Fan and H.A. Kierstead, The Square of Paths and Cycles,
*J. Combin. Theory Ser. B* **63, 55-64, 1995.
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August 14, 1997. Tommy R. Jensen
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A. Sánchez-Arroyo, A new upper bound for total colourings of graphs,
*Discrete Math.* **138, 375-377, 1995.
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August 25, 1997. Tommy R. Jensen
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M. Stiebitz, The forest plus stars colouring problem,
*Discrete Math.* **126, 385-389, 1994.
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August 26, 1997. Tommy R. Jensen
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H.P. Yap, *Total Colourings of Graphs*, Lecture Notes in Mathematics
**1623**, Springer 1996.

The year given in the reference "Yap[1989b]" seems to be wrong. In the Preface of his book, Yap mentions that the first draft was completed in October 1991.

August 11, 1997. Tommy R. Jensen and Bjarne Toft

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