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Molecular tweezers and pentameric aggregates : Convergent hydrogen-bonded self-assembly of 2:1 and 2:3 cocrystals of phthalazine:phthalic acidROGERS, R. D; SHARMA, C. V. K; WHITCOMB, D. R et al.Crystal engineering. 1998, Vol 1, Num 3-4, pp 255-262, issn 1463-0184Article