Work on Self-Descriptive Numbers

FOUR has four letters. It is therefore a self-descriptive number. TWENTY TWO has nine letters. It is not self-descriptive. However 22 = 17 + 1 + 4 which in words is SEVENTEEN ADD ONE ADD FOUR which has exactly twenty two letters and is now therefore self-descriptive. Gordon Hill (2ZP) managed to create self-descriptive forms for all the integers from 8 to 20. Here are his solutions:
		8 = FOUR TWOS 9 = NINE BY ONE 10 = TEN ADD ZERO 11 = NINE PLUS TWO 12 = NINE ADD THREE 13 = ELEVEN PLUS TWO 14 = ELEVEN ADD THREE 15 = FIFTEEN PLUS ZERO 16 = FIFTEEN ADDING ONE 17 = SEVENTEEN PLUS ZERO 18 = EIGHTEEN ADDING ZERO 19 = NINETEEN ADDING ZILCH 20 = TWENTY MINUS TWO ADD TWO
Alina Popa (2ZP) used Romanian numbers to create a quite unique list of self-descriptive numbers. Here are the names of the numbers and operations in the Romanian language (Some fonts may not cope!)
1 unu 2 doi 3 trei 4 patru 5 cinci	6 şase 7 şapte 8 opt 9 nouă 10 zece	11 unosprezece 12 doisprezece 13 treisprezece 14 patrusprezece 15 cincisprezece	16 şaisprezece 17 şaptesprezece 18 optsprezece 19 nouăsprezece 20 douăzeci	+ plus - minus x ori ÷ impărţit la
Here is Alina's list of Roumanian Self-descriptive Numbers:
		10 = DOI PLUS OPT 11 = DOI PLUS NOUĂ or UNUSPREZECE 12 = ŞASE PLUS ŞASE 13 = ŞASE PLUS ŞAPTE 14 = ŞAPTE PLUS ŞAPTE 17 = DOUĂZECI MINUS TREI 18 = ŞAISPREZECE PLUS DOI 19 = ŞAISPREZECE PLUS TREI 20 = ŞAISPREZECE PLUS PATRU