no. 4
Relative goodness of EOL forms
RAIRO. Informatique théorique, Tome 12 (1978) no. 4, pp. 291-304. 
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     author = {Maurer, H. A. and Salomaa, A. and Wood, D.},
     title = {Relative goodness of {EOL} forms},
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     pages = {291--304},
     publisher = {EDP-Sciences},
     volume = {12},
     number = {4},
     year = {1978},
     mrnumber = {517632},
     zbl = {0388.68067},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1978__12_4_291_0/}
}
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Maurer, H. A.; Salomaa, A.; Wood, D. Relative goodness of EOL forms. RAIRO. Informatique théorique, Tome 12 (1978) no. 4, pp. 291-304. http://archive.numdam.org/item/ITA_1978__12_4_291_0/

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6. Skyum, On good ETOL forms, Theoretical Computer Science (to appear), 1978. | MR | Zbl