Krzysztof R. Apt, Jan A. Bergstra, Lambert G. L. T. Meertens. Recursive Assertions are not enough - or are they?. Theoretical Computer Science, 8:73-87, 1979.
@article{AptBM79, title = {Recursive Assertions are not enough - or are they?}, author = {Krzysztof R. Apt and Jan A. Bergstra and Lambert G. L. T. Meertens}, year = {1979}, researchr = {https://researchr.org/publication/AptBM79}, cites = {0}, citedby = {0}, journal = {Theoretical Computer Science}, volume = {8}, pages = {73-87}, }