no. 2
The closure of radical classes under finite subdirect products
Compositio Mathematica, Tome 46 (1982) no. 2, pp. 145-158. 
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     title = {The closure of radical classes under finite subdirect products},
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     pages = {145--158},
     publisher = {Martinus Nijhoff Publishers},
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     number = {2},
     year = {1982},
     mrnumber = {659921},
     zbl = {0485.16006},
     language = {en},
     url = {http://www.numdam.org/item/CM_1982__46_2_145_0/}
}
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Gardner, B. J.; Stewart, Patrick N. The closure of radical classes under finite subdirect products. Compositio Mathematica, Tome 46 (1982) no. 2, pp. 145-158. http://www.numdam.org/item/CM_1982__46_2_145_0/

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