| Argentina Soja (www.planetasoja.com) |
| Internet (www.agrolink.com.br) |
| Ukraine (www.agromir-notill.com) |
| USA Pacific North West (www.directseed.org) |
| USA Kansas (www.notill.org) |
| Paraguai (www.rolf-derpsch.com) |
| Australia (www.no-till.com.au) |
| Australia (www.wantfa.com.au) |
| Australia (www.santfa.com.au) |
| Semeadora (www.semeato.com.br) |
| Cerrado (www.apdc.org.br) |
| Brasil (www.febrapdp.org.br) |
| Espanha (www.geocities.com/abulac) |
| Argentina (www.aapresid.org.ar) |
| Revista (www.plantiodireto.com.br) |
